Re: [sage-support] Error building sage, failed to build two packages
Le jeudi 18 avril 2024 à 00:36:07 UTC+2, Kevin a écrit : I increased my RAM allotment and decreased the number of threads used to 6, and that seems to have helped, but now I'm having an issue with two other packages, scipy and sagelib. In both cases, there is the error message gcc: fatal error: Killed signal terminated program cc1plus which points towards a RAM limitation. Could you further increase the RAM allocated to WSL? Eric. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/beaf4c99-9aef-4f60-a0b7-aa8d18e15313n%40googlegroups.com.
Re: [sage-support] Sagemanifolds error in example notebook
Le jeudi 8 février 2024 à 13:46:19 UTC+1, Dominic Steinitz a écrit : I volunteer Excellent! Thank you! Best wishes, Eric. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/839ef2d1-c7aa-4457-8385-26e6c3eebce9n%40googlegroups.com.
Re: [sage-support] Sagemanifolds error in example notebook
Le jeudi 8 février 2024 à 03:14:14 UTC+1, Matthias Koeppe a écrit : On Wednesday, February 7, 2024 at 7:00:07 AM UTC-8 Eric Gourgoulhon wrote: I don't know about any automated way to check that the example notebooks are up to date. One can use "jupyter nbconvert --to notebook --execute" for this https://nbconvert.readthedocs.io/en/latest/execute_api.html Thank you for the tip! Best wishes, Eric. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/14bbcbc2-136b-436b-83e9-a9774d80faabn%40googlegroups.com.
Re: [sage-support] Re: Sagemanifolds: object has no attribute 'exterior_der'
Le jeudi 8 février 2024 à 13:45:18 UTC+1, Dominic Steinitz a écrit : Sorry about posting the same thing twice. No problem. Just for reference, in case someone reads this thread: the answer about the connection forms is here: https://ask.sagemath.org/question/75256/connection-forms-not-anti-symmetric/ -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/fda2d459-24d2-47f4-8cec-6cf8033ca9fbn%40googlegroups.com.
[sage-support] Re: Sagemanifolds: object has no attribute 'exterior_der'
Le mercredi 7 février 2024 à 15:46:05 UTC+1, Dominic Steinitz a écrit : The example here https://sagemanifolds.obspm.fr/examples.html of - Electromagnetism in Minkowski spacetime <https://nbviewer.jupyter.org/github/ernestyalumni/Gravite/blob/master/EMsage.ipynb> [ipynb <https://raw.githubusercontent.com/ernestyalumni/Gravite/master/EMsage.ipynb>] (Electromagnetic field 2-form from E and B, Maxwell equations, conserved current, Lorentz force, Poynting vector) Fails with the error in the title and in more detail below. For reference: this is discussed in the new thread https://groups.google.com/g/sage-support/c/yD6k655EWOA/m/3AMzKdpaAQAJ Besides, the question about the connection forms has been answered on https://ask.sagemath.org/ Eric. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/6673df0f-7d05-43a8-a391-8d2a33866c01n%40googlegroups.com.
Re: [sage-support] Sagemanifolds error in example notebook
Le mercredi 7 février 2024 à 16:00:07 UTC+1, Eric Gourgoulhon a écrit : Indeed, this notebook is 8 years old and is not at all up to date (there is even Python 2 print commands in it!). Please open an issue at the Github repository hosting this notebook: https://github.com/ernestyalumni/Gravite/blob/master/EMsage.ipynb in order for the author to update it. In order to avoid any further confusion, I've temporarily removed the link to this notebook from https://sagemanifolds.obspm.fr/examples.html Any volunteer for providing a nice example notebook about electromagnetism is welcome! To publish it on the above page, make it publicly accessible (i.e. readable via nbviewer.org) and send a pull request to https://github.com/sagemanifolds/WebSite (or simply send the ipynb file to me) Eric. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/4626d855-a675-4074-a00b-6f692e5f9782n%40googlegroups.com.
Re: [sage-support] Sagemanifolds error in example notebook
Hi, Le mercredi 7 février 2024 à 15:46:05 UTC+1, Dominic Steinitz a écrit : Great thanks very much - I copied from the example - I guess I should have checked the manual - I wonder if there is some way of making sure the examples are always up to date. Indeed, this notebook is 8 years old and is not at all up to date (there is even Python 2 print commands in it!). Please open an issue at the Github repository hosting this notebook: https://github.com/ernestyalumni/Gravite/blob/master/EMsage.ipynb in order for the author to update it. I don't know about any automated way to check that the example notebooks are up to date. I am trying to maintain those hosted at https://github.com/sagemanifolds/SageManifolds up to date, but the one you are using is not part of them. By the way, note that since Sage 9.2 an alternative to F.exterior_derivative() is diff(F) Best wishes, Eric. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/07d046e2-7c74-4341-b789-cd732077e448n%40googlegroups.com.
[sage-support] Re: limitations of "solve"?
Hi,
Le mardi 28 novembre 2023 à 18:25:04 UTC+1, kcrisman a écrit :
Yes. Maxima's attitude is that the square root of negative one is an
expression which might have multiple values, rather than just picking one
you hope might be consistent over branch points.
To enforce Maxima to work in the real domain, avoiding to play too much
with complex square roots, one can add at the beginning of the Sage session:
maxima_calculus.eval("domain: real;")
Then the second example in the initial message of this thread yields
[[x == 2/5*sqrt(6)*sqrt(5), y == 16, l == 1/9*18750^(1/6)], [x ==
-2/5*sqrt(6)*sqrt(5), y == 16, l == -1/9*18750^(1/6)]]
instead of an empty list.
Eric.
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[sage-support] Re: limitations of "solve"?
Hi,
I've also noticed two days ago that https://sagecell.sagemath.org/ is very
slow (actually does not terminate) even on elementary operations.
Maybe there is a problem with the server at the moment...
Eric.
Le mardi 28 novembre 2023 à 16:36:30 UTC+1, Fernando Q. Gouvea a écrit :
> Yesterday I was demonstrating to my calculus class Sage's ability to
> implement the method of Lagrange multipliers. I used a standard example,
> putting the following code into SageMath Cell:
>
> var('x,y,l')
> f(x,y)=10*x^(1/3)*y^(2/3)
> g(x,y)=5*x-6*y
> fx=diff(f,x)
> fy=diff(f,y)
> gx=diff(g,x)
> gy=diff(g,y)
> solve((fx(x,y)==l*gx(x,y),fy(x,y)==l*gy(x,y),g(x,y)==120),(x,y,l))
>
> That works beautifully. Then I decided to show off Sage's powers by
> making a little change:
>
> var('x,y,l')
> f(x,y)=10*x^(1/3)*y^(2/3)
> g(x,y)=5*x^2+6*y
> fx=diff(f,x)
> fy=diff(f,y)
> gx=diff(g,x)
> gy=diff(g,y)
> solve((fx(x,y)==l*gx(x,y),fy(x,y)==l*gy(x,y),g(x,y)==120),(x,y,l))
>
> SageCell now gives me a spinning symbol ("I'm working") for a while,
> then seems to exit without any result. On my local installation (Sage
> 9.2 on Windows) it returns an empty list, [].
>
> What is curious is that the constraint equation 5x^2 + 6y=120 is easily
> solved for y...
>
> Questions:
>
> 1) Shouldn't SageCell output an empty list here?
>
> 2) Is this a known limitation of "solve"?
>
> Fernando
>
> PS: It seems that if I add "algorithm='sympy'" then solutions are found.
>
> --
> ==
> Fernando Q. Gouvea
> Carter Professor of Mathematics
> Colby College
> Mayflower Hill 5836
> Waterville, ME 04901
> fqgo...@colby.edu http://www.colby.edu/~fqgouvea
>
>
>
>
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[sage-support] Re: Odd Ricci scalar in Sagemanifolds
Hi,
The complicated result that you get is due to a lack of simplification in
Sage. More precisely, the default simplification chain automatically
applied in tensor calculus on manifolds, namely
https://doc.sagemath.org/html/en/reference/manifolds/sage/manifolds/utilities.html#sage.manifolds.utilities.simplify_chain_real
yields overcomplicated expressions in your case.
To get a much simpler result, which looks much closer to Eq. (37) of the
paper, you have to replace the default simplification chain by a customized
one. In your case, it suffices to use the function factor().
For this, use the manifold's method set_simplify_function() just after the
declaration of the chart X
https://doc.sagemath.org/html/en/reference/manifolds/sage/manifolds/manifold.html#sage.manifolds.manifold.TopologicalManifold.set_simplify_function
i.e. start you notebook with
N = Manifold(2,'N')
X. = N.chart(r' M:(0,oo) J:(-oo,oo)')
N.set_simplify_function(factor)
Best wishes,
Eric.
Le lundi 20 novembre 2023 à 04:44:49 UTC+1, Rogerio a écrit :
Recently I encountered an odd result while using Sagemanifolds to calculate
the Ricci scalar for a specific 2D metric. I was trying to reproduce Eq.
(37) of this paper <https://arxiv.org/pdf/gr-qc/0304015.pdf>, but the
result was quite different. Here is the code
N = Manifold(2,'N')
X. = N.chart(r' M:(0,oo) J:(-oo,oo)')
dM = X.coframe()[0]
dJ = X.coframe()[1]
g0 = 2/(1-J^2/M^4)^(3/2)*(-2*((1-J^2/M^4)^(3/2) +1-3*J^2/M^4)*dM*dM - 2*J/M
^3*dM*dJ - 2*J/M^3*dJ*dM + dJ*dJ/M^2)
g = N.metric('g')
g[:] = g0[:]
ric = g.ricci_scalar()
The result is a high order rational function not resembling the paper
result. However, taking
R = N.scalar_field(1/(4*M^2)*(sqrt(1-J^2/M^4)-2)/sqrt(1-J^2/M^4),name='R')
delta_R = ric-R
delta_R == 0
Results True.
How to express the Ricci scalar as shown in the paper?
Thanks in advance!
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[sage-support] help debugging latex() printing with trace()
I would like to debug the latex printing of an expression that ambiguous.
To reproduce it:
t = var('t')
x = function('x')(t)
latex( diff(x,t)^2 )
This produces ambiguous output, essentially:
partial_t x^2
instead of
(partial_t x)^2
I have tried:
from sage.misc.trace import trace
trace("latex( diff(x,t)^2 )")
but I can't understand in which .py file the translation of "diff" occurs.
As I understand the source code, there should be a _latex_(self) for every
object or method to display latex code, but I can't seem to find it here.
Any help is greatly appreciated.
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[sage-support] Re: scipy fails to build in sage 10.2.beta4 on fedora 38
I have the python package mesonpy installed... Perhaps I'm not setting my python path appropriately, but PYTHONPATH=/usr/lib/python3.11/site-packages points right to it. On Monday, September 25, 2023 at 4:30:11 PM UTC-5 Eric Majzoub wrote: > Fresh clone of git repository of sage. I issued: > > cd sage > ./bootstrap > ./configure --no-create --no-recursion > make > > I've attached the log file for the scipy fail. > > -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/c8b97804-3015-496f-803a-5184659cac7dn%40googlegroups.com.
[sage-support] scipy fails to build in sage 10.2.beta4 on fedora 38
Fresh clone of git repository of sage. I issued: cd sage ./bootstrap ./configure --no-create --no-recursion make I've attached the log file for the scipy fail. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/b65e6f4f-78b9-4e17-982d-a7839748dea4n%40googlegroups.com. Attempting to download package scipy-1.11.2.tar.gz from mirrors https://mirrors.mit.edu/sage/spkg/upstream/scipy/scipy-1.11.2.tar.gz [..] scipy-1.11.2 Setting up build directory for scipy-1.11.2 Finished extraction Applying patches from ../patches... Applying ../patches/numpy-include.patch patching file scipy/spatial/setup.py Hunk #1 succeeded at 39 (offset -1 lines). Applying ../patches/tests_no_internet_dependency.patch patching file scipy/datasets/meson.build Host system: Linux fedora 6.4.15-200.fc38.x86_64 #1 SMP PREEMPT_DYNAMIC Thu Sep 7 00:25:01 UTC 2023 x86_64 GNU/Linux C compiler: gcc C compiler version: Using built-in specs. COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-redhat-linux/13/lto-wrapper OFFLOAD_TARGET_NAMES=nvptx-none OFFLOAD_TARGET_DEFAULT=1 Target: x86_64-redhat-linux Configured with: ../configure --enable-bootstrap --enable-languages=c,c++,fortran,objc,obj-c++,ada,go,d,m2,lto --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --with-bugurl=http://bugzilla.redhat.com/bugzilla --enable-shared --enable-threads=posix --enable-checking=release --enable-multilib --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --enable-gnu-unique-object --enable-linker-build-id --with-gcc-major-version-only --enable-libstdcxx-backtrace --with-libstdcxx-zoneinfo=/usr/share/zoneinfo --with-linker-hash-style=gnu --enable-plugin --enable-initfini-array --with-isl=/builddir/build/BUILD/gcc-13.2.1-20230728/obj-x86_64-redhat-linux/isl-install --enable-offload-targets=nvptx-none --without-cuda-driver --enable-offload-defaulted --enable-gnu-indirect-function --enable-cet --with-tune=generic --with-arch_32=i686 --build=x86_64-redhat-linux --with-build-config=bootstrap-lto --enable-link-serialization=1 Thread model: posix Supported LTO compression algorithms: zlib zstd gcc version 13.2.1 20230728 (Red Hat 13.2.1-1) (GCC) Package 'scipy' is currently not installed No legacy uninstaller found for 'scipy'; nothing to do Installing scipy-1.11.2 DEPRECATION: --no-binary currently disables reading from the cache of locally built wheels. In the future --no-binary will not influence the wheel cache. pip 23.1 will enforce this behaviour change. A possible replacement is to use the --no-cache-dir option. You can use the flag --use-feature=no-binary-enable-wheel-cache to test the upcoming behaviour. Discussion can be found at https://github.com/pypa/pip/issues/11453 Processing /home/packages/SOURCE/sage/local/var/lib/sage/venv-python3.11/var/tmp/sage/build/scipy-1.11.2/src Preparing metadata (pyproject.toml): started Running command Preparing metadata (pyproject.toml) Preparing metadata (pyproject.toml): finished with status 'done' ERROR: Exception: Traceback (most recent call last): File "/home/packages/SOURCE/sage/local/var/lib/sage/venv-python3.11/lib64/python3.11/site-packages/pip/_internal/cli/base_command.py", line 160, in exc_logging_wrapper status = run_func(*args) ^^^ File "/home/packages/SOURCE/sage/local/var/lib/sage/venv-python3.11/lib64/python3.11/site-packages/pip/_internal/cli/req_command.py", line 247, in wrapper return func(self, options, args) ^ File "/home/packages/SOURCE/sage/local/var/lib/sage/venv-python3.11/lib64/python3.11/site-packages/pip/_internal/commands/wheel.py", line 170, in run requirement_set = resolver.resolve(reqs, check_supported_wheels=True) ^^^ File "/home/packages/SOURCE/sage/local/var/lib/sage/venv-python3.11/lib64/python3.11/site-packages/pip/_internal/resolution/resolvelib/resolver.py", line 73, in resolve collected = self.factory.collect_root_requirements(root_reqs) ^ File "/home/packages/SOURCE/sage/local/var/lib/sage/venv-python3.11/lib64/python3.11/site-packages/pip/_internal/resolution/resolvelib/factory.py", line 491, in collect_root_requirements req = self._make_requirement_from_install_req( File
[sage-support] Re: Installing SageMath 10.2.beta* in Ubuntu 22.04
Hi, >From the log files, all these failures have the same origin: g++: fatal error: Killed signal terminated program cc1plus It seems that the SageMath build has been interrupted by some external process. Have you tried https://sagemanifolds.obspm.fr/install_ubuntu.html ? Eric. Le mercredi 13 septembre 2023 à 04:48:21 UTC+2, Ian Benson a écrit : > Can you help to get the attached install to complete. > > At present it fails with the messages > > Error building Sage. > > The following package(s) may have failed to build (not necessarily > during this run of 'make all-start'): > > * package: fplll-5.4.4 > last build time: Sep 12 22:52 > log file: > /home/ibenson/sagemath/stagedevelop/sage/logs/pkgs/fplll-5.4.4.log > build directory: > /home/ibenson/sagemath/stagedevelop/sage/local/var/tmp/sage/build/fplll-5.4.4 > > * package: fflas_ffpack-2.4.3.p0 > last build time: Sep 12 22:55 > log file: > /home/ibenson/sagemath/stagedevelop/sage/logs/pkgs/fflas_ffpack-2.4.3.p0.log > build directory: > /home/ibenson/sagemath/stagedevelop/sage/local/var/tmp/sage/build/fflas_ffpack-2.4.3.p0 > > * package: giac-1.9.0.15p0 > last build time: Sep 12 22:59 > log file: > /home/ibenson/sagemath/stagedevelop/sage/logs/pkgs/giac-1.9.0.15p0.log > build directory: > /home/ibenson/sagemath/stagedevelop/sage/local/var/tmp/sage/build/giac-1.9.0.15p0 > > No LSB modules are available. > Distributor ID: Ubuntu > Description:Ubuntu 22.04.2 LTS > Release:22.04 > > I attach the logs as requested. > > Many thanks for all your hard work. > > ~i > -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/49fc7b49-67fb-4f0a-af4d-4de090d959b1n%40googlegroups.com.
[sage-support] Re: SageMath in Docker image
Hi, You can find SageMath Docker images at https://hub.docker.com/r/sagemath/sagemath/tags The latest stable version posted here is SageMath 10.0. The image of SageMath 10.1, which has been released 4 days ago, should appear soon. Best wishes, Eric. Le mercredi 23 août 2023 à 15:23:38 UTC+2, Varvara Karpova a écrit : Hello, I am interested in running SageMath (ideally as kernel with JupyterHub) in a Docker image other than cocalc. On the installation page https://doc.sagemath.org/html/en/installation/index.html the link to "another Docker image providing SageMath <https://github.com/sagemath/sage/issues/wiki/Distribution#Dockerimages>" seems to be broken. Can anyone suggest which Docker images I could use and where to find them? Thanks a lot, Varvara -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/c1dcb4ed-e95c-488d-81b9-56338e460eb5n%40googlegroups.com.
[sage-support] Re: Error building 9.8 on Ubuntu 23.04
Thank you, this allows sage to complete the build. However, now I have
another problem. When I run sage from its install directory it gives the
error:
AttributeError: module 'sage_conf' has no attribute '_main'
And then strangely, it starts Sage 9.5, the version installed on my system
through apt. I didn't want to remove this version using apt because I
thought it would remove a lot of packages that I need for other programs.
Here is the full output.
./sage
Traceback (most recent call last):
File "/home/packages/SOURCE/sage/ehm_install/bin/././sage-config", line
33, in <
module>
sys.exit(load_entry_point('sage-conf', 'console_scripts',
'sage-config')())
^^^
File "/home/packages/SOURCE/sage/ehm_install/bin/././sage-config", line
25, in i
mportlib_load_entry_point
return next(matches).load()
File "/usr/lib/python3.11/importlib/metadata/__init__.py", line 204, in
load
return functools.reduce(getattr, attrs, module)
AttributeError: module 'sage_conf' has no attribute '_main'
Traceback (most recent call last):
File "/home/packages/SOURCE/sage/ehm_install/bin/././sage-config", line
33, in <
module>
sys.exit(load_entry_point('sage-conf', 'console_scripts',
'sage-config')())
^^^
File "/home/packages/SOURCE/sage/ehm_install/bin/././sage-config", line
25, in i
mportlib_load_entry_point
return next(matches).load()
File "/usr/lib/python3.11/importlib/metadata/__init__.py", line 204, in
load
return functools.reduce(getattr, attrs, module)
AttributeError: module 'sage_conf' has no attribute '_main'
┌┐
│ SageMath version 9.5, Release Date: 2022-01-30 │
│ Using Python 3.11.2. Type "help()" for help. │
└┘
On Friday, April 7, 2023 at 4:53:15 PM UTC-5 John H Palmieri wrote:
> Some recent versions of Singular don't seem to work with Sage. You could
> try "make distclean" (to start over) and "./configure
> --with-system-singular=no" to force Sage to build its own Singular. Then
> "make".
>
> On Friday, April 7, 2023 at 2:22:20 PM UTC-7 Eric Majzoub wrote:
>
>> Following the procedure outlined on the Sage install page for Ubuntu.
>>
>> make fails showing:
>> Error building Sage.
>>
>> The following package(s) may have failed to build (not necessarily
>> during this run of 'make all-start'):
>>
>> * package: sagelib-9.8
>> last build time: Apr 7 15:48
>> log file:/home/packages/SOURCE/sage/logs/pkgs/sagelib-9.8.log
>>
>> The log file is attached. It shows that gcc exits with status 1, but
>> doesn't give any specific error output from gcc itself. It fails on
>> building multi_polynomial_libsingular.
>>
>> Any help is appreciated.
>>
>
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[sage-support] Re: Cannot build Sage 9.7 on Opensuse
It would probably be better to use the system openblas binary instead of building it from source during the Sage install. To do so, install the Opensuse package openblas (development version) (for Ubuntu, the package name is libopenblas-dev, I don't know for Opensuse). Then run configure again and then make. Eric. Le mercredi 15 février 2023 à 06:02:21 UTC+1, lingmin cui a écrit : > After make I get > > *** > Error building Sage. > > The following package(s) may have failed to build (not necessarily > during this run of 'make all-start'): > > * package: openblas-0.3.20 > last build time: Feb 15 11:07 > log file: >/home/tr0uble/sage/sage-9.7/logs/pkgs/openblas-0.3.20.log > build directory: > /home/tr0uble/sage/sage-9.7/local/var/tmp/sage/build/openblas-0.3.20 > > It is safe to delete any log files and build directories, but they > contain information that is helpful for debugging build problems. > WARNING: If you now run 'make' again, the build directory of the > same version of the package will, by default, be deleted. Set the > environment variable SAGE_KEEP_BUILT_SPKGS=yes to prevent this. > > > and here is the openblas log file > -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/fd085177-d19f-4173-ad37-b9280fc17331n%40googlegroups.com.
Re: [sage-support] Two point tensors?
Hi, Could it be that you are looking for the pushforward operator associated to a differentiable map between two manifolds? cf. https://doc.sagemath.org/html/en/reference/manifolds/sage/manifolds/differentiable/diff_map.html#sage.manifolds.differentiable.diff_map.DiffMap.pushforward Eric. Le dimanche 5 février 2023 à 12:56:05 UTC+1, chris.patr...@gmail.com a écrit : > Apologies, must read email when my brain is working. The deformation > gradient has a covariant index on M and a contravariant index on S. As such > it maps a vector on M to a (deformed m) vector on S i.e., x^i = F^i_J X^J > where F^i_J = \del chi(X^i) / X^J where x = \chi(X). > > On Sun, 5 Feb 2023 at 10:05 PM, Chris Bradley > wrote: > >> Hi all, >> I'm new to Sage so forgive me if this is a dumb question but does Sage >> deal with two-point tensors? By this I mean a second order tensor with one >> contravariant index in the tangent space of one manifold and one >> contravariant index in the tangent space of another manifold. The >> particular application is in solid mechanics and is the deformation >> gradient tensor which is given by the derivative of the map between the two >> manifolds i.e., \chi: M -> S where M has chart coordinates X and S has >> chart coordinates x and the deformation gradient tensor is given by F = >> \del \chi/ \del X. All I've managed to find, documentation wise, involves >> creating tensors from the tangent/cotangent space of a single manifold >> rather than a tensor from the tangent space of M and the tangent space of >> S. Thanks in advance. >> >> Best wishes >> Chris >> >> -- >> You received this message because you are subscribed to a topic in the >> Google Groups "sage-support" group. >> To unsubscribe from this topic, visit >> https://groups.google.com/d/topic/sage-support/XDQHDYuKwRs/unsubscribe. >> To unsubscribe from this group and all its topics, send an email to >> sage-support...@googlegroups.com. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/sage-support/94042d7b-7772-4778-818f-21bcea9646b6n%40googlegroups.com >> >> <https://groups.google.com/d/msgid/sage-support/94042d7b-7772-4778-818f-21bcea9646b6n%40googlegroups.com?utm_medium=email_source=footer> >> . >> > -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/7aa4c9d9-62ec-4f19-b4de-2f83e9d7eab3n%40googlegroups.com.
[sage-support] Re: gridlines in 3d ?
Le mardi 17 janvier 2023 à 19:52:32 UTC+1, kcrisman a écrit : Nice ! Would you consider a ticket adding this to Sage ? +1 to that! +1 too! Don't hesitate to ask if you need help to open a ticket on https://trac.sagemath.org/. Or maybe you want to wait for the migration of SageMath sources to github, which should take place in February. Eric. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/11c6fd21-f238-470d-bdd4-15ed5ed231a0n%40googlegroups.com.
[sage-support] Re: Sage 9.5 fails to start just after an installation
Maybe there is something wrong in the SageMath package for your system. Since your system is based on Ubuntu, I would advise to build SageMath from sources by following these lines: https://sagemanifolds.obspm.fr/install_ubuntu.html It's just a few lines to copy and paste in a terminal. The benefit is that it will provide you with the latest version of Sage (9.7). Best wishes, Eric. Le jeudi 24 novembre 2022 à 14:33:20 UTC+1, m.ko...@gmail.com a écrit : > I have operating system Linux Lite 6.2 that is based on Ubuntu. I > installed Sage from windows package manager Synaptic that is available > through Xfce menu. When I write into terminal prompt the command sage, Sage > starts with info > SageMath version 9.5, Release Date: 2022-01-30 │ > │ Using Python 3.10.6. Type "help()" for help. > > But suddenly follows some Python warnings, like > /usr/bin/python3(+0x23d9fd)[0x55b08278a9fd] > /usr/bin/python3(+0x15cdc9)[0x55b0826a9dc9] > /usr/bin/python3(_PyEval_EvalFrameDefault+0x289f)[0x55b08269484f] > /usr/bin/python3(_PyFunction_Vectorcall+0x7c)[0x55b0826a9b6c] > > Plenty of similar staff and Sage start crashes with text: > #248 0x7fda0c267dc0 in __libc_start_main_impl () at > ./csu/../csu/libc-start.c:392 > #249 0x55b082777a90 in _start () > > [Inferior 1 (process 3907) detached] > 30../sysdeps/unix/sysv/linux/wait4.c: Adresár alebo súbor neexistuje. > Saved trace to /home/michal/.sage/crash_logs/crash_ikxir8ce.log > > Unhandled SIGILL: An illegal instruction occurred. > This probably occurred because a *compiled* module has a bug > in it and is not properly wrapped with sig_on(), sig_off(). > Python will now terminate. > > I use Slovak localization. "Adresár alebo súbor neexistuje." could be > translated as "No file or folder." or as "File or directory does not > exist.". > I do not know where the problem is and what to do to make sage working. > > I am sending crash_ikxir8ce.log file as an attachment. And I am adding a > print screen of Synaptic package manager choices for Sage > > Many thanks for help. > > Best regards > Michal Kopčok (read as Kopchok) > -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/01ca88e9-c56b-4b68-bd86-b8f0d6a7fc1an%40googlegroups.com.
[sage-support] Re: plot() silently switches to a different scale when numbers are too big
The plot is still linear-linear, but the y axis is labelled by y/1e6 instead of y. This is clearly a bug. Thanks for reporting it. A ticket has already been opened for this issue: https://trac.sagemath.org/ticket/34233 Eric. Le mercredi 21 septembre 2022 à 03:18:24 UTC+2, erentar a écrit : > My problem can be explained with the following two plots: > > plot(factorial(x),x,0,9) > > and > > plot(factorial(x),x,0,10) > > When plotting up to 9, the plot gives me exactly what i expect, a > linear-linear plot. > When plotting up to 10 though, sage silently chose to make the y-axis > log10. This should not be the standard behavior as it leads to confusion. > -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/bb4caf03-3c82-4c8b-84af-360f42faaf9dn%40googlegroups.com.
[sage-support] Re: Simplifications and sagemanifold
Thank you for these instructive benchmarks! Best wishes, Eric. Le dimanche 4 septembre 2022 à 07:35:18 UTC+2, roger...@gmail.com a écrit : > Thank you very much Eric! It works perfectly well for my needs. > I've tested the time spent for calculating the Riemann tensor (restarting > the kernel to avoid cache) for three different simplifying methods: the > standard, the simplify, and a function that just returns the expression. It > makes a huge difference. > > For the Kerr-Newman metric, without simplification is ~500x faster > (considering the wall time). > > - default > CPU times: user 5min 6s, sys: 4.16 s, total: 5min 10s > Wall time: 3min > > - simplify > CPU times: user 40.1 s, sys: 359 ms, total: 40.4 s > Wall time: 27.3 s > > - no simplification > CPU times: user 468 ms, sys: 785 µs, total: 468 ms > Wall time: 340 ms > > > For the metric given by > > [-1, 0, 0, 0] > [0, h11(t, r, th, ph), h12(t, r, th, ph), h13(t, r, th, ph)] > [0, h12(t, r, th, ph), h22(t, r, th, ph), h23(t, r, th, ph)] > [0, h13(t, r, th, ph), h23(t, r, th, ph), h33(t, r, th, ph)] > > the results are more even impressive. No simplification is ~4000x faster. > > - default > CPU times: user 40min 26s, sys: 17.9 s, total: 40min 43s > Wall time: 31min 29s > > - simplify > CPU times: user 3min 10s, sys: 978 ms, total: 3min 11s > Wall time: 2min 44s > > - no simplification > CPU times: user 715 ms, sys: 14.2 ms, total: 729 ms > Wall time: 573 ms > > Best wishes, > > Rogerio > > Em sábado, 3 de setembro de 2022 às 12:55:33 UTC-3, egourg...@gmail.com > escreveu: > >> Le vendredi 2 septembre 2022 à 08:09:23 UTC+2, roger...@gmail.com a >> écrit : >> >>> Components of tensors in sagemanifolds are nicely simplified through >>> methods of chart functions. However, for large and complicated expressions, >>> such simplifications are very time consuming. >>> Is it possible to turn off these simplifications? >> >> >> Yes, via the method M.set_simplify_function. It suffices to pass a fast >> function as argument, like simplify. >> For instance: >> >> sage: M = Manifold(4, 'M') >> sage: X. = M.chart() >> sage: M.set_simplify_function(simplify) >> >> NB: the call to M.set_simplify_function must be done after the chart(s) >> have been defined. It can also be done chartwise, via >> X.calculus_method().set_simplify_function(simplify) >> >> See >> >> https://doc.sagemath.org/html/en/reference/manifolds/sage/manifolds/manifold.html#sage.manifolds.manifold.TopologicalManifold.set_simplify_function >> for details. >> >> Best wishes, >> >> Eric. >> > -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/af76ad88-21ab-44c8-a710-b4c09e6c4b77n%40googlegroups.com.
[sage-support] Re: Simplifications and sagemanifold
Le vendredi 2 septembre 2022 à 08:09:23 UTC+2, roger...@gmail.com a écrit : > Components of tensors in sagemanifolds are nicely simplified through > methods of chart functions. However, for large and complicated expressions, > such simplifications are very time consuming. > Is it possible to turn off these simplifications? Yes, via the method M.set_simplify_function. It suffices to pass a fast function as argument, like simplify. For instance: sage: M = Manifold(4, 'M') sage: X. = M.chart() sage: M.set_simplify_function(simplify) NB: the call to M.set_simplify_function must be done after the chart(s) have been defined. It can also be done chartwise, via X.calculus_method().set_simplify_function(simplify) See https://doc.sagemath.org/html/en/reference/manifolds/sage/manifolds/manifold.html#sage.manifolds.manifold.TopologicalManifold.set_simplify_function for details. Best wishes, Eric. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/33638357-b06e-4d02-9506-df39f75994dbn%40googlegroups.com.
[sage-support] Re: Installing Error
Hi, Which version of Ubuntu are you using ? Maybe it is worth to install from source instead of using the Ubuntu package. This is usually very easy for Ubuntu: visit https://sagemanifolds.obspm.fr/install_ubuntu.html Best wishes, Eric. Le mardi 14 juin 2022 à 20:53:48 UTC+2, scal...@gmail.com a écrit : > Hi all. I am relatively new to linux and I am trying to install sagemath > on ubuntu instead of using co-calc. I am attempting to install sage (and > hopefully make it communicable with emacs) on my new computer. After > running > > sudo apt update > sudo apt install sagemath > sage > > I get the following error. Does anyone know how to read this and figure > out what I missed in trying to install sage? > > > -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/97ea05f2-541b-45af-8126-e051c3c717efn%40googlegroups.com.
[sage-support] Re: Where do I report that 1-1=2 :)
Indeed, in Jupyter or Jupyterlab, the underscore is rendered as a minus
sign in %display latex mode.
For instance,
%display latex
type(ZZ)
returns
<회횕횊횜횜
'횜횊횐횎.횛횒횗횐횜.횒횗횝횎횐횎횛⎯횛횒횗횐.홸횗횝횎횐횎횛횁횒횗횐⎯회횕횊횜횜'>
while
print(type(ZZ))
gives
I don't know where the replacement of underscores by minus signs comes
from...
Le dimanche 5 juin 2022 à 15:50:41 UTC+2, raymond@gmail.com a écrit :
> show('1_1=',2)
> Works fine in console mode.
> In jupyter and jupyterlab:
>
> 1-1=2
>
> It seems to be auto-corrected; I see the correct output momentarily then
> it gets "corrected".
> Where should I report it?
>
> Sagemath 9.6
> Linux Mate
> Google chrome and Firefox
>
> rrogers
>
>
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[sage-support] Re: Crystals won't view in jupiter notebook
I got the same error from the console of Sage 9.7.beta1 running on Ubuntu
20.04.
So it is not specific to Sage 9.3, nor to Windows...
Le mercredi 1 juin 2022 à 23:00:05 UTC+2, dbis...@gmail.com a écrit :
> I have installed Sagemath 9.3 on my windows 10 computer and have run the
> following code:
> view(crystals.Tableaux("A3",shape=[2,1]))
>
> I end up getting this long error:
>
> An error occurred. This is pdfTeX, Version 3.141592653-2.6-1.40.24 (MiKTeX
> 22.3) (preloaded format=pdflatex 2022.6.1) 1 JUN 2022 21:54 entering
> extended mode restricted \write18 enabled. %&-line parsing enabled.
> **\nonstopmode \input{sage.tex} (sage.tex
> (C:\Users\dbisa\AppData\Local\Programs\MiKTeX\tex/latex/base\article.cls
> Document Class: article 2021/10/04 v1.4n Standard LaTeX document class
> (C:\Users\dbisa\AppData\Local\Programs\MiKTeX\tex/latex/base\size10.clo
> File: size10.clo 2021/10/04 v1.4n Standard LaTeX file (size option) )
> \c@part=\count185 \c@section=\count186 \c@subsection=\count187
> \c@subsubsection=\count188 \c@paragraph=\count189 \c@subparagraph=\count190
> \c@figure=\count191 \c@table=\count192 \abovecaptionskip=\skip47
> \belowcaptionskip=\skip48 \bibindent=\dimen138 )
> (C:\Users\dbisa\AppData\Local\Programs\MiKTeX\tex/latex/amsmath\amsmath.sty
> Package: amsmath 2021/10/15 v2.17l AMS math features \@mathmargin=\skip49
> For additional information on amsmath, use the `?' option.
> (C:\Users\dbisa\AppData\Local\Programs\MiKTeX\tex/latex/amsmath\amstext.sty
> Package: amstext 2021/08/26 v2.01 AMS text
> (C:\Users\dbisa\AppData\Local\Programs\MiKTeX\tex/latex/amsmath\amsgen.sty
> File: amsgen.sty 1999/11/30 v2.0 generic functions \@emptytoks=\toks16
> \ex@=\dimen139 ))
> (C:\Users\dbisa\AppData\Local\Programs\MiKTeX\tex/latex/amsmath\amsbsy.sty
> Package: amsbsy 1999/11/29 v1.2d Bold Symbols \pmbraise@=\dimen140 )
> (C:\Users\dbisa\AppData\Local\Programs\MiKTeX\tex/latex/amsmath\amsopn.sty
> Package: amsopn 2021/08/26 v2.02 operator names ) \inf@bad=\count193 LaTeX
> Info: Redefining \frac on input line 234. \uproot@=\count194
> \leftroot@=\count195 LaTeX Info: Redefining \overline on input line 399.
> \classnum@=\count196 \DOTSCASE@=\count197 LaTeX Info: Redefining \ldots on
> input line 496. LaTeX Info: Redefining \dots on input line 499. LaTeX Info:
> Redefining \cdots on input line 620. \Mathstrutbox@=\box50
> \strutbox@=\box51 \big@size=\dimen141 LaTeX Font Info: Redeclaring font
> encoding OML on input line 743. LaTeX Font Info: Redeclaring font encoding
> OMS on input line 744. \macc@depth=\count198 \c@MaxMatrixCols=\count199
> \dotsspace@=\muskip16 \c@parentequation=\count266 \dspbrk@lvl=\count267
> \tag@help=\toks17 \row@=\count268 \column@=\count269 \maxfields@=\count270
> \andhelp@=\toks18 \eqnshift@=\dimen142 \alignsep@=\dimen143
> \tagshift@=\dimen144 \tagwidth@=\dimen145 \totwidth@=\dimen146
> \lineht@=\dimen147 \@envbody=\toks19 \multlinegap=\skip50
> \multlinetaggap=\skip51 \mathdisplay@stack=\toks20 LaTeX Info: Redefining
> \[ on input line 2938. LaTeX Info: Redefining \] on input line 2939. )
> (C:\Users\dbisa\AppData\Local\Programs\MiKTeX\tex/latex/amsfonts\amssymb.sty
> Package: amssymb 2013/01/14 v3.01 AMS font symbols
> (C:\Users\dbisa\AppData\Local\Programs\MiKTeX\tex/latex/amsfonts\amsfonts.sty
> Package: amsfonts 2013/01/14 v3.01 Basic AMSFonts support
> \symAMSa=\mathgroup4 \symAMSb=\mathgroup5 LaTeX Font Info: Redeclaring math
> symbol \hbar on input line 98. LaTeX Font Info: Overwriting math alphabet
> `\mathfrak' in version `bold' (Font) U/euf/m/n --> U/euf/b/n on input line
> 106. )) (C:\Users\dbisa\AppData\Local\Programs\MiKTeX\tex/latex/graphics\
> graphicx.st y Package: graphicx 2021/09/16 v1.2d Enhanced LaTeX Graphics
> (DPC,SPQR)
> (C:\Users\dbisa\AppData\Local\Programs\MiKTeX\tex/latex/graphics\keyval.sty
> Package: keyval 2014/10/28 v1.15 key=value parser (DPC) \KV@toks@=\toks21 )
> (C:\Users\dbisa\AppData\Local\Programs\MiKTeX\tex/latex/graphics\graphics.sty
> Package: graphics 2021/03/04 v1.4d Standard LaTeX Graphics (DPC,SPQR)
> (C:\Users\dbisa\AppData\Local\Programs\MiKTeX\tex/latex/graphics\trig.sty
> Package: trig 2021/08/11 v1.11 sin cos tan (DPC) )
> (C:\Users\dbisa\AppData\Local\Programs\MiKTeX\tex/latex/graphics-cfg\graphics.c
>
> fg File: graphics.cfg 2016/06/04 v1.11 sample graphics configuration )
> Package graphics Info: Driver file: pdftex.def on input line 107.
> (C:\Users\dbisa\AppData\Local\Programs\MiKTeX\tex/latex/graphics-def\pdftex.def
>
> File: pdftex.def 2020/10/05 v1.2a Graphics/color driver for pdftex ))
> \Gin@req@height=\dimen148 \Gin@req@width=\dimen149 )
> (C:\Users\dbisa\AppData\Local\Programs\MiKTeX\tex/latex/jknappen\mathrsfs.sty
> Package: mathrsfs 1996/01/01 Math RSFS package v1.0 (jk)
> \symrsfs=\mathgroup6 )
> (C:\Users\dbisa\AppData\Local\Programs\MiKTeX\tex/latex/base\inputenc.sty
> Package: inputenc 2021/02/14 v1.3d Input encoding file
>
[sage-support] Re: plotting tangent vectors to a curve
Le mercredi 13 avril 2022 à 19:18:48 UTC+2, kcrisman a écrit : > Eric, if I opened a ticket, would you be willing to add a couple examples > of this to the plot documentation? Yes of course. I wasn't aware of this > but it would be a great addition. (Is there a 3d version as well for > space curves?) > Yes it works for curves in 3d space, an more generally in any dimension (but the plots are then projections to 2d or 3d spaces). An example of a 3d curve plotted with its tangent velocity field is the loxodrome of the sphere shown at https://sagemanifolds.obspm.fr/gallery.html Eric. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/78ff0934-5633-4f8e-bbd7-793c900226e9n%40googlegroups.com.
[sage-support] Re: plotting tangent vectors to a curve
Hi,
Le vendredi 8 avril 2022 à 22:13:51 UTC+2, fqgo...@colby.edu a écrit :
> There is an easy way to plot vector fields in Sage. Is there an easy way
> to plot a curve and (some of) its tangent vectors?
>
You can achieve this via the method tangent_vector_field() of curves,
see the second plot ("Plot of the curve and its tangent vector field") at
https://doc.sagemath.org/html/en/reference/manifolds/sage/manifolds/differentiable/curve.html
Eric.
>
>
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[sage-support] Re: search_def(), search_src() are not working in Sage
Hi, Le mercredi 23 mars 2022 à 20:52:08 UTC+1, adarsh.k...@gmail.com a écrit : > I tried running > ``` > make sagemath_doc_html > ``` > as instructed. Unfortunately, it does not solve the error. > > You are still running SageMath 9.0, which the version shipped with Ubuntu 20.04. It is outdated. To fix this, 1/ remove the Ubuntu package "sagemath" 2/ Install SageMath 9.5 by following these simple instructions: https://sagemanifolds.obspm.fr/install_ubuntu.html Then search_src, search_def and search_doc will work. Eric. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/6bfbaa0b-47dc-4646-bd08-37fdbe880e1an%40googlegroups.com.
[sage-support] Re: Possible bug in ExpressionNice
Le mardi 22 février 2022 à 14:09:08 UTC+1, Eric Gourgoulhon a écrit : > Hi, > > Thanks for the report! > This is indeed a bug. It is fixed in > https://trac.sagemath.org/ticket/33399 > The fix has been merged in SageMath 9.6.beta4. So the next stable version of SageMath will be free of this bug. Thanks again for the report! Eric. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/31d62bf5-0cb2-48b9-9984-2006430d4f1fn%40googlegroups.com.
Re: [sage-support] Re: SageMath on Microsoft Windows
Le lundi 28 février 2022 à 00:26:35 UTC+1, dim...@gmail.com a écrit : > On Sun, Feb 27, 2022 at 11:21 PM Fernando Gouvea > wrote: > > > > Ubuntu includes python3, but not python without a number. I guess I > could make a symlink? > > yes, this will solve this problem. > Alternatively, you can install the Ubuntu package python-is-python3, which makes the symlink for you. Eric. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/a0080c4a-5861-4522-a751-5edb69b405a4n%40googlegroups.com.
[sage-support] Re: Compiling Sage on Ubuntu 20.05
A quick way to install Sage 9.5 from sources on Ubuntu 20.04 is decribed at https://sagemanifolds.obspm.fr/install_ubuntu.html HTH. Eric. Le dimanche 27 février 2022 à 13:08:36 UTC+1, iitds...@gmail.com a écrit : > Hi all, > > I have been trying to install sage 9.5 from source on Ubuntu. > > After running the following command i get an error. > > CC=gcc-7 CXX=g++ FC=gfortran-7 ./configure > > The error that i get is. > > configure: error: > > Given --with-system-gcc=force, but no system package could be used. > That's an error. Please install the indicated package to continue. > (To override this error, use ./configure --without-system-gcc) > > Does anyone have a solution for this ? (using -without-system-gcc does fix > this error but why could system package not be used) > > Thanks, > Saksham. > -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/4ddfbed9-22df-463f-b11b-6ef21b63db71n%40googlegroups.com.
[sage-support] Re: Possible bug in ExpressionNice
Hi,
Thanks for the report!
This is indeed a bug. It is fixed in
https://trac.sagemath.org/ticket/33399
Eric
Le dimanche 20 février 2022 à 05:17:55 UTC+1, alexander...@gmail.com a
écrit :
> Hello,
>
> I think there are parenthesis missing in the output of this:
>
> sage: from sage.manifolds.utilities import ExpressionNice
> sage: x,y,u,v = var('x y u v')
> sage: f = function('f')(x, y)
> sage: ExpressionNice(f.subs(x=u+v,y=u-v).diff(v).diff(u))
> d^2(f)/d(u + v)^2 - d^2(f)/du - v^2
>
> I expected the output to be
> d^2(f)/d(u + v)^2 - d^2(f)/d(u - v)^2
> with parenthesis around (u - v).
>
> Alex
>
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[sage-support] Re: Tensor Multiprocessing broken. SageMath 9.5 on Apple Mac OSX 12.1 . SageMath-9.5_x86_64
Le jeudi 27 janvier 2022 à 18:59:36 UTC+1, alan_thoma...@yahoo.co.uk a écrit : > That works. I get all cores used. > Great! I've opened the ticket https://trac.sagemath.org/ticket/33241 for that. Eric. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/a6ca6c0c-98ba-48ab-ab25-a27dfa84f396n%40googlegroups.com.
[sage-support] Re: Tensor Multiprocessing broken. SageMath 9.5 on Apple Mac OSX 12.1 . SageMath-9.5_x86_64
Le mardi 25 janvier 2022 à 23:59:20 UTC+1, John H Palmieri a écrit :
> Are you using OS X? Could this possibly be due to how Python handles
> multiprocessing on OS X vs. other platforms? (See
>
> https://docs.python.org/3/library/multiprocessing.html#contexts-and-start-methods,
>
> in particular the comment "On macOS, the *spawn* start method is now the
> default" and https://bugs.python.org/issue33725.)
>
>
Thank you John for pointing this!
Alan, could you try to run your notebook after having added the following
lines at the top of it?
import multiprocessing as mp
mp.set_start_method('fork')
Eric.
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[sage-support] Re: Tensor Multiprocessing broken. SageMath 9.5 on Apple Mac OSX 12.1 . SageMath-9.5_x86_64
Hi, Le mardi 25 janvier 2022 à 12:54:57 UTC+1, alan_thoma...@yahoo.co.uk a écrit : > I get errors in this notebook if I set the variable tpar to any value > greater than one. (Number of Tensor processing cores.) > > *http://alan.atstafford.co.uk/Sage9.5Problem.ipynb > <http://alan.atstafford.co.uk/Sage9.5Problem.ipynb>* > Your notebook works well with tpar=4 on my Ubuntu computer running Sage 9.5.rc4. What kind of error do you get? Eric. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/16e676c2-0731-4864-b1e5-fa834bd83f0an%40googlegroups.com.
Re: [sage-support] Re: trouble displaying 3D graphics
Le mardi 9 novembre 2021 à 10:38:29 UTC+1, dim...@gmail.com a écrit : > I wonder if 'file:///' must be present in the URL for the script source > for Chrome/Chromium to load it. > > This does not seem to be an issue with 'file:///' in the URL since Chromium refuses to open any hidden directory while browsing directories in the window opened after CTRL+O. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/dd62df2d-4a09-4475-bdf6-62af5a3249e3n%40googlegroups.com.
[sage-support] Re: trouble displaying 3D graphics
Le mardi 9 novembre 2021 à 10:16:34 UTC+1, Eric Gourgoulhon a écrit :
> I confirm the issue experienced by John with Chromium: on my Ubuntu
> 20.04.3 computer, the implicit_plot3d command from Sage console
> - works out of the box by opening a new tab in Firefox (my default browser)
> - results in a file access error with Chromium, after having selected the
> latter by
> sage: sage.misc.viewer.viewer.browser('chromium')
>
> It turns out that one cannot even open the directory ~/.sage from Chromium
> with a simple CTRL+O: this results in "Permission denied", while the same
> CTRL+O works fine with Firefox. Actually, no hidden directory can be opened
> from Chromium. So this is certainly a configuration issue on the Chromium
> side.
>
> Eric.
>
The Chromium issue with hidden files has been already reported here:
https://askubuntu.com/questions/1312932/cant-browse-access-hidden-files-and-folders-with-chromium
No solution has been proposed though...
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[sage-support] Re: trouble displaying 3D graphics
I confirm the issue experienced by John with Chromium: on my Ubuntu 20.04.3
computer, the implicit_plot3d command from Sage console
- works out of the box by opening a new tab in Firefox (my default browser)
- results in a file access error with Chromium, after having selected the
latter by
sage: sage.misc.viewer.viewer.browser('chromium')
It turns out that one cannot even open the directory ~/.sage from Chromium
with a simple CTRL+O: this results in "Permission denied", while the same
CTRL+O works fine with Firefox. Actually, no hidden directory can be opened
from Chromium. So this is certainly a configuration issue on the Chromium
side.
Eric.
Le lundi 8 novembre 2021 à 12:25:24 UTC+1, John Cremona a écrit :
> I don't often use 3D graphics, but when I run implicitplot3d() I get
> a file permissions error (on ubuntu 20.04):
>
> # example from the docstring
> sage: var('x,y,z')
> (x, y, z)
> sage: implicit_plot3d(x^2+y^2+z^2==4, (x,-3,3), (y,-3,3), (z,-3,3))
> Launched html viewer for Graphics3d Object
>
> Over in my browser (chromium-browser) I see the error message "Access
> to the file was deniedThe file at
> file:///home/john/.sage/temp/john-Latitude-E5470/2250012/tmp_x5e1jfy0.html
> is not readable. It may have been removed, moved or file permissions
> may be preventing access." I changed the permissions on .sage and
> everything under it to a+rx and reloaded, with no change. I deleted
> all of ~/.sage and restarted sage and reran the commands, but the same
> happened.
>
> I can view other html files in my home directory using the browser.
>
> What should I do?
>
> John
>
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[sage-support] Re: Installing Package in Systemwise Sagemath
Le dimanche 22 août 2021 à 15:49:28 UTC+2, asd00012...@gmail.com a écrit : > > I installed Sagemath for the entire system using ``sudo apt-get install > sagemath'' on my Ubuntu machine. When I tried to do something like ``sage > -i kohel_database,'' it told me that it is an unknown option. As searched > from the ASKSAGE etc., there's no such options within the apt installed > version. So is there alternatives to install packages for this kind of > sagemath environment? Or we need to start over and build a fresh local > sagemath environment from scratch? > Unfortunately, the last option is the only way out here. So please download one of the binary builds available at https://www.sagemath.org/download-linux.html. The bonus is that you'll get a version of SageMath newer than the system one. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/5b8742cb-699c-4c8f-a981-44d7698c549en%40googlegroups.com.
[sage-support] Re: How to download as LaTeX, and have output boxes rendered
Hello, You should upgrade to at least SageMath 9.2, where this bug has been fixed; cf. my answer on asksagemath: https://ask.sagemath.org/question/58626/how-to-download-as-latex-and-have-output-boxes-rendered/ Le lundi 23 août 2021 à 10:43:26 UTC+2, Jákup a écrit : > > I'm using the Jupyter notebook, and the "download as .tex" option works > great for me. > The only problem is, I want the output to be rendered. > Inside the notebook, I have '%display latex' set, so all output is > rendered in latex. However to my great surprise, when I export the > worksheet into a .tex file, the output boxes revert to normal unformatted > text. > Is there a way to make the latex formatting of outputs "survive" when > saving it as a LaTeX document? > > I'm not afraid of writing the LaTeX myself, but this workflow needs to > work for exams, where time is a factor. > Thanks for your help > > SageMath version 9.0, Release Date: 2020-01-01 │ > │ Using Python 3.8.10. > Running Linux. > > Here are pictures of how it looks in my notebook, and in the exported > LaTeX: > [image: 2021-08-23_10-33.png][image: latex.png] > > -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/84ad0ed7-05f3-447f-b9db-1689b6162e34n%40googlegroups.com.
[sage-support] Re: Setting viewpoint in implicit_plot3d
Hi,
The viewpoint option is missing at the moment (SageMath 9.1) in the
threejs viewer, but it has been introduced in SageMath 9.2, which is about
to be released, see
https://wiki.sagemath.org/ReleaseTours/sage-9.2#Graphics
Eric.
Le vendredi 16 octobre 2020 à 09:38:00 UTC+2, Michel VAN DEN BERGH a écrit :
> Dear all,
>
> I have this plot command which works fine
>
> var('x,y,z')
> G=implicit_plot3d(x^2+y^2-z^2==0.0001, (x,-1,1), (y,-1,1),
> (z,-1,1),plot_points=200,frame=False,viewer="threejs")
>
> However I would like to change the default camera position and I cannot
> figure out how to do this... I would be very grateful to anyone that can
> help me.
>
> Michel
>
>
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[sage-support] Re: How to define a generic function?
Simply use
mr = function('m')(r)
See
https://nbviewer.jupyter.org/github/sagemanifolds/SageManifolds/blob/master/Worksheets/v1.3/SM_TOV.ipynb
for a full example.
Best wishes,
Eric.
Le dimanche 4 octobre 2020 à 10:15:43 UTC+2, matt...@gmail.com a écrit :
> I am trying to calculate the general expression of the Kretschmann scalar
> of metric depending a non specified function m(r): how do I define such a
> function? II have tried with
> def m(r)
> but it is wrong since it expects a definition of the function
>
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Re: [sage-support] Re: integrating sin(t)/t
Le mardi 29 septembre 2020 à 14:27:38 UTC+2, fqgo...@colby.edu a écrit : > Good news! When is 9.2 expected to be ready? > Sage 9.2 should be released within a few weeks (the beta cycle is almost over and the release candidate cycle should start soon). Meanwhile, you can take a look at the new features: https://wiki.sagemath.org/ReleaseTours/sage-9.2 Best wishes, Eric. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/e756d63c-5e97-4c95-abe7-fd698fa9805cn%40googlegroups.com.
[sage-support] Re: integrating sin(t)/t
I confirm the issue with the Taylor series with Sage 9.1. Fortunately, the
bug seems to have been fixed for Sage 9.2. As Emmanuel, I get the correct
Taylor series with Sage 9.2.beta13.
Le mardi 29 septembre 2020 à 09:36:09 UTC+2, Emmanuel Charpentier a écrit :
> I can’t reproduce your problem :
>
> sage: sage.version.version
> '9.2.beta13'
> sage: var('t')
> t
> sage: assume(x>0)
> sage: f(x)=integrate(sin(t)/t,t,0,x)
> sage: f
> x |--> sin_integral(x)
> sage: taylor(f(x),x,0,10)
> 1/3265920*x^9 - 1/35280*x^7 + 1/600*x^5 - 1/18*x^3 + x
>
> My platform is Debian testing running on core i7 + 16 GB RAM ; sage is
> built to use as much system packages as possible. hat are your platforms ?
>
> HTH,
> Le lundi 28 septembre 2020 à 22:03:56 UTC+2, fqgo...@colby.edu a écrit :
>
>> I am trying to see how to do a standard calculus exercise in Sage. I want
>> a power series for the integral of sin(x)/x. I tried:
>>
>> sage: var('t')
>> t
>> sage: assume(x>0)
>> sage: f(x)=integrate(sin(t)/t,t,0,x)
>> sage: f
>> x |--> sin_integral(x)
>> sage: taylor(f(x),x,0,10)
>> 73/466560*x^9 - 127/35280*x^7 + 31/600*x^5 - 7/18*x^3 + x
>>
>> The first weirdness is that Sage can't compute the integral unless I add
>> the "assume(x>0)"; I'm not sure why.
>>
>> The second weirdness is that the Taylor series is wrong!
>> Taylor(Si(x),x,0,10) gives the same answer.
>>
>> Fernando
>>
>>
>> --
>> ==
>> Fernando Q. Gouvea
>> Carter Professor of Mathematics
>> Colby College
>> Mayflower Hill 5836
>> Waterville, ME 04901fqgo...@colby.edu
>> http://www.colby.edu/~fqgouvea
>>
>> The object of opening the mind, as of opening the mouth, is to shut it
>> again on something solid.
>> -- G. K. Chesterton, Autobiography.
>>
>>
>>
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[sage-support] Re: Adding new attribute to Poset
Poset is a function, which constructs a finite poset, not the poset class, as you can check: sage: type(Poset) You can also check it by having a look at the source code: sage: Poset?? So when you write Poset.upper_bounds = upper_bounds you are attaching upper_bounds to the function, not to the class of posets. The latter is FinitePoset (actually a subclass of it, name FinitePoset_with_category, which is constructed dynamically via Sage category mechanism). So you should do sage: from sage.combinat.posets.posets import FinitePoset sage: FinitePoset.upper_bounds = upper_bounds Then sage: X = Poset(...) sage: X.upper_bounds(...) shoud work. Le lundi 28 septembre 2020 à 18:29:43 UTC+2, pong a écrit : > For convenient, I would like to add an attribute, upper_bounds, to Poset > objects > > However, after writing the method and issue > Poset.upper_bounds = upper_bounds > > X.upper_bounds(S) complains > > 'FinitePoset_with_category' object has no attribute 'upper_bounds' > > When I try > FinitePoset_with_category.upper_bounds = upper_bounds > > I got > name 'FinitePoset_with_category' is not defined > > So how can one add an attribute to FinitePoset_with_category? > -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/7b4691ad-9bab-4f71-818d-371b8011a42dn%40googlegroups.com.
[sage-support] Re: gridlines in 0.5 units
Here is an example enforcing the gridlines every 0.5 units: plot(sin(x^2), (x, 0, 6), gridlines=[[0, 0.5, .., 6], [-1, -0.5, .., 1]]) See https://doc.sagemath.org/html/en/reference/plotting/sage/plot/graphics.html#sage.plot.graphics.Graphics.show for more examples. Eric. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/29f4748b-73a6-4627-ab03-7089aee10aa5o%40googlegroups.com.
[sage-support] Re: Multiprocessing for Tensors is not working for Macintosh. (SageMath 9.0)
Le dimanche 31 mai 2020 02:33:06 UTC+2, Alan Stafford a écrit : > > I have just updated to SageMath 9.1 and updated my OS. I see that ncpus.py > has been changed. > I have tested the multiprocessing with the file enclosed above and others > and it is working. Thank you all for fixing this. > Thanks for this good news. I am happy to see that this long standing issue with macOS is fixed! Best wishes, Eric. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/69c83dfe-cdca-4f92-aba5-3dd620e30e06%40googlegroups.com.
[sage-support] Re: Multiprocessing for Tensors is not working for Macintosh. (SageMath 9.0)
Le vendredi 29 mai 2020 13:43:35 UTC+2, Alan Stafford a écrit : > > I have an inkling that it is the code to probe the number of processors > present that is at fault. It uses the right command but doesn't use the > result and always returns one. This causes problems with the interface to > maxima if one has set the number of cores for tensor computations to other > than one. I will try this out by changing the code the I get some time. > Thank you for investigating this! I've opened the ticket https://trac.sagemath.org/ticket/29755 Feel free to report any investigation / code change in the ticket. Eric. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/54a3b0a6-d335-4822-b51f-f3a978fe60d3%40googlegroups.com.
[sage-support] Re: Cotton Tensor gives wrong result.
Hi, What do you mean exactly by "Cotton tensor gives wrong result" ? Maybe this is matter of convention... SageMath's definition of the Cotton conformal tensor is here: https://doc.sagemath.org/html/en/reference/manifolds/sage/manifolds/differentiable/metric.html#sage.manifolds.differentiable.metric.PseudoRiemannianMetric.cotton Best wishes, Eric. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/3857c32e-0ba5-4db6-93bb-a579c31216ab%40googlegroups.com.
[sage-support] Re: Multiprocessing for Tensors is not working for Macintosh. (SageMath 9.0)
Hi, Le dimanche 24 mai 2020 15:15:14 UTC+2, Alan Stafford a écrit : > > Multiprocessing of Tensors is not working for Macintosh. > > Alas, this is a known issue that has been reported repeatedly by macOS users: Sage's multiprocessing seems broken on macOS. No fix has been proposed yet. What is strange is that the doctests involving multiprocessing are passed on macOS. So there is something in the doctest framework that makes it work. But in an interactive session, it fails, as you noticed. I am not familiar at all with macOS and cannot help on this point. Sorry... Eric. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/c1994de9-ad67-4454-80a3-03481b7e47c5%40googlegroups.com.
[sage-support] Re: naive question
You should use simplify_full() instead of simplify():
sage: var('s t')
(s, t)
sage: thirdroot = ((s^2 - 1)*t^2 - s^2 + 1)/(s^2 + 2*s*t + t^2)
sage: factor(thirdroot + 1)
(s*t + 1)^2/(s + t)^2
sage: a = thirdroot + 1 - (s*t + 1)^2/(s+t)^2
sage: a
((s^2 - 1)*t^2 - s^2 + 1)/(s^2 + 2*s*t + t^2) - (s*t + 1)^2/(s + t)^2 + 1
sage: a.simplify_full()
0
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[sage-support] Re: Parallelization of contractions
Hi,
Le mercredi 29 janvier 2020 08:47:32 UTC+1, Mattia Villani a écrit :
>
> I did as suggested adding the line
>
>
> Parallelism().set(nproc=4)
>
> before the contraction, but it behaves strangely: it works for a short while
> with 4 processors, then with 3, then with 2 and finally it works for hours
> with a single processor.
> It seems that no new packages are distributed between the processors.
>
>
>
This behaviour is not so strange: the parallelization is performed on
pairs of indices and it could that for one pair of indices the computation
takes much longer time. Since most of the computational time is spent in
the simplification of symbolic expressions, you could try to use a light
simplifying function via the method M.set_simplify_function, where M is
your manifold. The fastest one would be M.set_simplify_function(simplify),
but it might not be efficient. See
https://doc.sagemath.org/html/en/reference/manifolds/sage/manifolds/manifold.html#sage.manifolds.manifold.TopologicalManifold.set_simplify_function
for examples.
Best wishes,
Eric.
> Il giorno mercoledì 22 gennaio 2020 07:43:52 UTC+1, Mattia Villani ha
> scritto:
>>
>> How to use parallelization on contraction of tensor? Consider the case I
>> have two successive contraction like this:
>>
>> Tud=etuu['^{ab}']*eamup['^c_b']
>> Tp=Tud['^{ab}']*eamup['^c_a']
>>
>> How con I parallelize it?
>>
>
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[sage-support] Re: Parallelization of contractions
Le mercredi 22 janvier 2020 07:43:52 UTC+1, Mattia Villani a écrit :
>
> How to use parallelization on contraction of tensor? Consider the case I
> have two successive contraction like this:
>
> Tud=etuu['^{ab}']*eamup['^c_b']
> Tp=Tud['^{ab}']*eamup['^c_a']
>
> How con I parallelize it?
>
It suffices to type, before your code for contraction:
Parallelism().set(nproc=8)
Then the calculus of the contactions will be parallelized on 8 processes.
Of course, you can adapt the value of nproc to your computer.
An example is here
<https://nbviewer.jupyter.org/github/sagemanifolds/SageManifolds/blob/master/Notebooks/SM_Kerr.ipynb>
.
Best wishes,
Eric.
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[sage-support] Re: Endomorphism Rings of Elliptic Curves
In the ordinary case, is it possible to get the regular function corresponding to some endomorphism? On Wednesday, January 22, 2020 at 1:40:54 PM UTC-5, John Cremona wrote: > > I suspect the question might have been referring to elliptic curves over > finite fields. In the ordinary case you can ask for the Frobenius order and > know that the endomorphism ring is between that and the maximal order of > its field of fractions (an imaginary quadratic field) but as far as I know > Sage jas no implementation of finding the exact endomorphism ring such as > Kohel's algorithm. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/0231708a-f73b-4ada-a5c0-edf80557b2c4%40googlegroups.com.
[sage-support] Endomorphism Rings of Elliptic Curves
Is there a way to get the endomorphism ring of an elliptic curve in Sage? -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/ff46239b-4e71-4286-9e84-cda7db4641c4%40googlegroups.com.
Re: [sage-support] sage with python3, mpmath
PS: a similar error has been reported on ask.sagemath: https://ask.sagemath.org/question/49534/error-with-mpmathfindroot-on-89/ Le mardi 14 janvier 2020 11:55:08 UTC+1, Eric Gourgoulhon a écrit : > > Le mardi 14 janvier 2020 11:36:44 UTC+1, Dima Pasechnik a écrit : >> >> >> mpmath version on Sage 8.6 is 1.0.0, and later and now it is 1.1.0 >> >> This might explain the problem, which maybe should be reported upstream: >> >> https://github.com/fredrik-johansson/mpmath >> >> > > It's OK with Sage 8.9, which has already mpmath 1.1.0. So the problem is > not due to the version of mpmath. Maybe a Python 2 / Python 3 issue? > Another data point: the issue is there in Sage 9.0.beta5 (Python 3). > > Eric. > > -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/5a7d5bb4-c406-4b8f-a757-370578307ed1%40googlegroups.com.
Re: [sage-support] sage with python3, mpmath
Le mardi 14 janvier 2020 11:36:44 UTC+1, Dima Pasechnik a écrit : > > > mpmath version on Sage 8.6 is 1.0.0, and later and now it is 1.1.0 > > This might explain the problem, which maybe should be reported upstream: > > https://github.com/fredrik-johansson/mpmath > > It's OK with Sage 8.9, which has already mpmath 1.1.0. So the problem is not due to the version of mpmath. Maybe a Python 2 / Python 3 issue? Another data point: the issue is there in Sage 9.0.beta5 (Python 3). Eric. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/5d8b20d9-66b7-41e8-af08-6e3c82374856%40googlegroups.com.
Re: [sage-support] Sage9.0 installation ubuntu
Hi, Le dimanche 12 janvier 2020 10:25:50 UTC+1, Jean-Florent Raymond a écrit : > > Hello Alex, > > You can download binaries at the following address: > https://www.sagemath.org/download-linux.html > There is nothing to build in this case. See the "Usage" paragraph for > instructions how to use them. > > Basically, this is bunzip2 sage-9.0-Ubuntu_18.04-x86_64.tar.bz2 tar xvf sage-9.0-Ubuntu_18.04-x86_64.tar cd SageMath ./sage -n jupyter You can combine the first two commands into a single one thanks to the 'j' option of tar: tar jxvf sage-9.0-Ubuntu_18.04-x86_64.tar.bz2 Eric. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/1409fdfd-3274-4456-9806-d99b38642f97%40googlegroups.com.
[sage-support] Re: Jupiter Server fails to start on macOS Catalina
I did not have ~/.sage. Removed org.sagemath.Sage.plist, but no difference for me. On Monday, January 6, 2020 at 11:01:33 PM UTC+1, Stefano Brocco wrote: > > There is more to it: after doing all of the above, plus removing both > ~/.sage and org.sagemath.Sage.plist, the jupyter did start. Unfortunately I > don't know if the critical step in my case was the removal of ~/.sage or of > the plist file. > > On Monday, January 6, 2020 at 1:13:50 PM UTC-5, Eric Martin wrote: >> >> Same behaviour, with the same log, also after giving Sage Full Disk >> Access as suggested by Ralf Martin. >> >> On Monday, January 6, 2020 at 2:44:19 PM UTC+1, slelievre wrote: >>> >>> >>> Mon 2020-01-06 10:04:35 UTC, Eric Martin: >>>> >>>> After installing sage-9.0-OSX_10.15.2-x86_64.app.dmg, doubling clicking >>>> >>> the Sage icon immediately results in a window popping up with the >>>> message: >>>> >>> "Jupiter Server fails to start. For some reason the Jupiter server ailed >>>> to start. >>>> >>> [...] >>>> >>> >>> Try running the following commands in a terminal: >>> >>> APP=/Applications/SageMath-9.0.app >>> xattr -dr com.apple.quarantine $APP >>> >>> If it says you don't have the permissions for that, >>> try the same with "sudo" as follows: >>> >>> APP=/Applications/SageMath-9.0.app >>> sudo xattr -dr com.apple.quarantine $APP >>> >>> -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/27e520ad-e181-4f38-8cde-4ac93b7573db%40googlegroups.com.
[sage-support] Re: Jupiter Server fails to start on macOS Catalina
Same behaviour, with the same log, also after giving Sage Full Disk Access as suggested by Ralf Martin. On Monday, January 6, 2020 at 2:44:19 PM UTC+1, slelievre wrote: > > > Mon 2020-01-06 10:04:35 UTC, Eric Martin: >> >> After installing sage-9.0-OSX_10.15.2-x86_64.app.dmg, doubling clicking >> > the Sage icon immediately results in a window popping up with the message: >> > "Jupiter Server fails to start. For some reason the Jupiter server ailed >> to start. >> > [...] >> > > Try running the following commands in a terminal: > > APP=/Applications/SageMath-9.0.app > xattr -dr com.apple.quarantine $APP > > If it says you don't have the permissions for that, > try the same with "sudo" as follows: > > APP=/Applications/SageMath-9.0.app > sudo xattr -dr com.apple.quarantine $APP > > -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/7c2543a3-25d8-478a-bc86-284f2fe9f712%40googlegroups.com.
[sage-support] Re: Offline help with Sage 9.0 from jupyter notebook did not work
Just a data point: "*Help - > Sage Documentation" in the Jupyter notebook works with Sage 9.0 built from source in Ubuntu 18.04.* *Eric. * -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/1a1e6f3c-2104-4432-ae27-f9a0fccb4293%40googlegroups.com.
[sage-support] Jupiter Server fails to start on macOS Catalina
After installing sage-9.0-OSX_10.15.2-x86_64.app.dmg, doubling clicking the Sage icon immediately results in a window popping up with the message: "Jupiter Server fails to start. For some reason the Jupiter server ailed to start. Please check the log for clues, and have that information handy when asking for help." The log shows: Rewriting paths for your new installation directory === This might take a few minutes but only has to be done once. patching /Applications/SageMath-9.0.app/Contents/Resources/sage/build/make/Makefile-auto patching /Applications/SageMath-9.0.app/Contents/Resources/sage/config.status patching /Applications/SageMath-9.0.app/Contents/Resources/sage/local/bin/2to3-3.7 patching /Applications/SageMath-9.0.app/Contents/Resources/sage/local/bin/ESingular patching /Applications/SageMath-9.0.app/Contents/Resources/sage/local/bin/NRswitchg patching /Applications/SageMath-9.0.app/Contents/Resources/sage/local/bin/QuadraticSieve patching /Applications/SageMath-9.0.app/Contents/Resources/sage/local/bin/R patching /Applications/SageMath-9.0.app/Contents/Resources/sage/local/bin/Rscript patching /Applications/SageMath-9.0.app/Contents/Resources/sage/local/bin/Singular patching /Applications/SageMath-9.0.app/Contents/Resources/sage/local/bin/TSingular patching /Applications/SageMath-9.0.app/Contents/Resources/sage/local/bin/addedgeg patching /Applications/SageMath-9.0.app/Contents/Resources/sage/local/bin/adjacency patching /Applications/SageMath-9.0.app/Contents/Resources/sage/local/bin/adjacency_gmp patching /Applications/SageMath-9.0.app/Contents/Resources/sage/local/bin/allfaces patching /Applications/SageMath-9.0.app/Contents/Resources/sage/local/bin/allfaces_gmp patching /Applications/SageMath-9.0.app/Contents/Resources/sage/local/bin/amtog patching /Applications/SageMath-9.0.app/Contents/Resources/sage/local/bin/annotate patching /Applications/SageMath-9.0.app/Contents/Resources/sage/local/bin/biplabg patching /Applications/SageMath-9.0.app/Contents/Resources/sage/local/bin/cas_help patching /Applications/SageMath-9.0.app/Contents/Resources/sage/local/bin/catg patching /Applications/SageMath-9.0.app/Contents/Resources/sage/local/bin/cddexec patching /Applications/SageMath-9.0.app/Contents/Resources/sage/local/bin/cddexec_gmp patching /Applications/SageMath-9.0.app/Contents/Resources/sage/local/bin/cl patching /Applications/SageMath-9.0.app/Contents/Resources/sage/local/bin/complg patching /Applications/SageMath-9.0.app/Contents/Resources/sage/local/bin/converseg patching /Applications/SageMath-9.0.app/Contents/Resources/sage/local/bin/copyg patching /Applications/SageMath-9.0.app/Contents/Resources/sage/local/bin/countg patching /Applications/SageMath-9.0.app/Contents/Resources/sage/local/bin/cu2 patching /Applications/SageMath-9.0.app/Contents/Resources/sage/local/bin/cubex patching /Applications/SageMath-9.0.app/Contents/Resources/sage/local/bin/cubhamg patching /Applications/SageMath-9.0.app/Contents/Resources/sage/local/bin/curve_keygen patching /Applications/SageMath-9.0.app/Contents/Resources/sage/local/bin/cygdb patching /Applications/SageMath-9.0.app/Contents/Resources/sage/local/bin/cysignals-CSI patching /Applications/SageMath-9.0.app/Contents/Resources/sage/local/bin/cython patching /Applications/SageMath-9.0.app/Contents/Resources/sage/local/bin/cythonize patching /Applications/SageMath-9.0.app/Contents/Resources/sage/local/bin/deledgeg patching /Applications/SageMath-9.0.app/Contents/Resources/sage/local/bin/delptg patching /Applications/SageMath-9.0.app/Contents/Resources/sage/local/bin/directg patching /Applications/SageMath-9.0.app/Contents/Resources/sage/local/bin/dreadnaut patching /Applications/SageMath-9.0.app/Contents/Resources/sage/local/bin/dretodot patching /Applications/SageMath-9.0.app/Contents/Resources/sage/local/bin/dretog patching /Applications/SageMath-9.0.app/Contents/Resources/sage/local/bin/easy_install patching /Applications/SageMath-9.0.app/Contents/Resources/sage/local/bin/easy_install-3.7 patching /Applications/SageMath-9.0.app/Contents/Resources/sage/local/bin/ecl patching /Applications/SageMath-9.0.app/Contents/Resources/sage/local/bin/ecl-config patching /Applications/SageMath-9.0.app/Contents/Resources/sage/local/bin/ecm patching /Applications/SageMath-9.0.app/Contents/Resources/sage/local/bin/f2py patching /Applications/SageMath-9.0.app/Contents/Resources/sage/local/bin/f2py3 patching /Applications/SageMath-9.0.app/Contents/Resources/sage/local/bin/f2py3.7 patching /Applications/SageMath-9.0.app/Contents/Resources/sage/local/bin/fai patching /Applications/SageMath-9.0.app/Contents/Resources/sage/local/bin/fflas-ffpack-config patching /Applications/SageMath-9.0.app/Contents/Resources/sage/local/bin/fourier patching /Applications/SageMath-9.0.app/Contents/Resources/sage/local/bin/fourier_gmp patching
[sage-support] Re: Memory efficient calculation of the Kretschmann scalar
Well, if memory is really an issue, you can avoid the creation of the intermediate tensor fields uR and dR by writing gc = g.components() igc = g.inverse().components() Rc = R.components() kr = 0 for a in M.irange(): for b in M.irange(): for c in M.irange(): for d in M.irange(): for i in M.irange(): for j in M.irange(): for k in M.irange(): for l in M.irange(): kr += gc[[a, i]]*igc[[b, j]]*igc[[c, k]]*igc [[d, l]] \ *Rc[[i, b, c, d]]*Rc[[a, j, k, l]] kr.expr() It is certainly more efficient in term of memory, but less efficient in term of CPU time, since the symmetries of the Riemann tensor are not taken into account in the above writing. Best wishes, Eric. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/9b401de7-166e-4471-9aa3-362c94cae3af%40googlegroups.com.
[sage-support] Re: Book with Sage (and Python 3)
Hi, Le jeudi 26 décembre 2019 17:18:07 UTC+1, Manfred Einsiedler a écrit : > > Thanks for your prompt and very helpful reply. I am happy to wait a couple > of weeks to use the official version 9.0 for testing the sage content of > the book. > Sage 9.0.rc0 has just been released, so hopefully Sage 9.0 should be out in one week or so. Best wishes, Eric. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/a0493b75-edb9-493b-9da2-d4ff53876687%40googlegroups.com.
[sage-support] Re: Book with Sage (and Python 3)
Congratulations for the book. It looks very nice! The switch to Python 3 shall take place in early January, with the release of SageMath 9.0. You can see some details on https://wiki.sagemath.org/Python3-Switch. <https://wiki.sagemath.org/Python3-Switch> As you say, your code examples are likely to work without any change, except for the print command, which must replaced by the print() function. A thing that certainly must be updated is the reference to Sage notebook in Sec. 1.8.1 (page 63): the default notebook is now Jupyter. It is launcher with sage -n jupyter not with notebook(). You can export your old Sage notebooks (*.sws) to the Jupyter format (*.ipynb) via the command sage -n export A big advantage of Jupyter notebooks is that it is very easy to share them online provided they are stored in some public repository, like github or gitlab: non-interactive versions are displayed with nbviewer.jupyter.org while interactive ones are launched via binder. <https://mybinder.org/> You can see many examples here <https://sagemanifolds.obspm.fr/examples.html> (nbviewer) or here <https://github.com/egourgoulhon/SageMathTour/blob/master/README.md> (binder). Best wishes, Eric. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/bae01e6d-4572-4c3e-ac5b-cf6bd50ee649%40googlegroups.com.
[sage-support] Re: Changelog for Sage?
Le jeudi 17 octobre 2019 12:59:35 UTC+2, Szabolcs Horvát a écrit : > > Is there a changelog for Sage 8.8 or 8.9? I can only find 8.7 on the > website: http://www.sagemath.org/changelogs/index.html > > Are there plans to create a more user-friendly changelog? The changelogs I > linked list every single change, but it is hard for a normal user (not a > developer) to figure out if there was a change that is relevant for me ... > Many other software have both a full list of changes, but also an easy to > digest summary of important major changes. > There was a discussion in that direction on Trac #22176 <https://trac.sagemath.org/ticket/22176>, but it seems stalled at the moment... Eric. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/eb10719b-70e8-4fec-8afd-fb66a4051f21%40googlegroups.com.
[sage-support] Re: Ubuntu 18.04 binaries for Sage 8.9?
Le jeudi 17 octobre 2019 18:27:40 UTC+2, Tom Flyer a écrit : > > I can't find any Ubuntu 18.04 binary for Sage 8.9 on the mirrors listed at > http://www.sagemath.org/download-linux.html. > Are there any issues in creating these binary? > > The SageMath 8.9 binaries for Ubuntu 18.04 are now available from the download page. Best wishes, Eric. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/7aad62c0-3c68-4b25-970c-1314d74c53a0%40googlegroups.com.
Re: [sage-support] Sage Crash Report
Le lundi 14 octobre 2019 08:57:57 UTC+2, Dima Pasechnik a écrit : > > Dear Dave, > > On Mon, Oct 14, 2019 at 1:03 AM dave dobbs > > wrote: > > > > OS: Xubuntu 18.04.1 64-bit > > downloaded from SAGE: sage-8.9-Ubuntu_16.04-x86_64.tar.bz2 > > wrong version - notice that you are running Ubuntu 18.04, and you're > trying a tarball fot 16.04. > > Tarball for 18.04 is not ready yet, I think. > The SageMath 8.9 binaries for Ubuntu 18.04 are now available from the download page: https://www.sagemath.org/download-linux.html Best wishes, Eric. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/8589d46e-d664-45e4-8585-a5a6bb4ee1b9%40googlegroups.com.
[sage-support] Finite Field Zage Logs Larger than 2^16
It is possible to get element_givaro.py to create finite fields using zech logs for order larger than 2^16? The memory shouldn't be an issue. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at https://groups.google.com/group/sage-support. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/cdd8d106-392f-4eb5-81c7-3134d4de4184%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[sage-support] Re: sign problem spherical harmonics
Unfortunately, the current implementation of spherical harmonics in Sage
suffers from various issues. One is the sign convention, which is different
from the standard one, as you pointed out. Another issue is getting false
results for some parameters, like
sage: theta, phi = var('theta phi')
sage: spherical_harmonic(1, 1, theta, phi)
-1/4*sqrt(3)*sqrt(2)*sqrt(-sin(theta)^2)*e^(I*phi)/sqrt(pi)
The term sqrt(-sin(theta)^2) in the above expression is plain false. It
should be sin(theta).
This issue is related to the bug reported in
https://trac.sagemath.org/ticket/25034
As a workaround, I would recommend to use the function
spin_weighted_spherical_harmonic with the spin weight set to zero instead
of spherical_harmonic. The function spin_weighted_spherical_harmonic is not
part of the main SageMath, but of the SageMath package kerrgeodesics_gw
<https://pypi.org/project/kerrgeodesic-gw/>. So you have to install the
later via
sage -pip install kerrgeodesic_gw
NB: on CoCalc, you have to add the option --user:
sage -pip install --user kerrgeodesic_gw
Then, you will get (the first argument, i.e. 0, is the spin weight; if
zero, one gets the standard spherical harmonics):
sage: from kerrgeodesic_gw import spin_weighted_spherical_harmonic
sage: spin_weighted_spherical_harmonic(0, 2, 1, theta, phi)
-1/4*sqrt(15)*sqrt(2)*cos(theta)*e^(I*phi)*sin(theta)/sqrt(pi)
sage: spin_weighted_spherical_harmonic(0, 1, 1, theta, phi)
-1/4*sqrt(6)*e^(I*phi)*sin(theta)/sqrt(pi)
Both results agree with the standard values, as given e.g. in
https://en.wikipedia.org/wiki/Table_of_spherical_harmonics
Eric.
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[sage-support] Re: Pushing to trac from GitHub
Hi, Le mardi 2 avril 2019 21:40:14 UTC+2, Bea Galiana a écrit : > > Hi, > > so I was wondering, is it possible to push to trac without having a trac > account, only logged with a GitHub account? > > I think yes, see http://doc.sagemath.org/html/en/developer/trac.html The branch name (created automatically during the first push) must be of the form u/gh-/ or public/ where is your GitHub name and is any name you may choose to specify the branch. Best wishes, Eric. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at https://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
[sage-support] Re: simplify more quickly?
I've edited my answer at https://ask.sagemath.org/question/45959/grad-at-glacial-speed/ to indicate how to change the simplification algorithm. Best wishes, Eric. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at https://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
[sage-support] Re: simplification options
Le lundi 11 mars 2019 19:05:04 UTC+1, Michael Beeson a écrit :
>
> I appreciate Eric's post, and I do use subs sometimes, but it makes me
> nervous since
> it will happily substitute any old thing you tell it to, even an
> incorrect thing. So, if your idea
> is to check a computation, it is a dangerous thing.
>
In order to minimize the error risk in the substitution, note that you can
use the Python variable b defined as
b = sqrt(1-a^2)
in the argument of subs(), thereby avoiding any duplicate code. The whole
code becomes then
sage: var('p,q,r,a') # note: no b at this stage
(p, q, r, a)
sage: b = sqrt(1-a^2)
sage: eq = (p*a+r*b+q)^2
sage: eq = eq.expand(); eq
a^2*p^2 - a^2*r^2 + 2*sqrt(-a^2 + 1)*a*p*r + 2*a*p*q + 2*sqrt(-a^2 + 1)*q*r
+ q^2 + r^2
sage: eq.subs({b: SR.var('b')})
a^2*p^2 + 2*a*b*p*r - a^2*r^2 + 2*a*p*q + 2*b*q*r + q^2 + r^2
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[sage-support] Re: simplification options
What about something like
sage: var('p,q,r,a')
(p, q, r, a)
sage: b = sqrt(1-a^2)
sage: eq = (p*a+r*b+q)^2
sage: eq = eq.expand(); eq
a^2*p^2 - a^2*r^2 + 2*sqrt(-a^2 + 1)*a*p*r + 2*a*p*q + 2*sqrt(-a^2 + 1)*q*r
+ q^2 + r^2
sage: b = var('b')
sage: eq.subs({sqrt(1-a^2): b})
a^2*p^2 + 2*a*b*p*r - a^2*r^2 + 2*a*p*q + 2*b*q*r + q^2 + r^2
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[sage-support] Re: solve() behavior
Hi, Le lundi 18 février 2019 21:56:56 UTC+1, Michael Beeson a écrit : > > sage: solve(*2**(x+sqrt(*1*-x^*2*))-*7*,x) > > [x == -sqrt(-x^2 + 1) + 7/2] > > > sage: version() > > 'SageMath version 8.0, Release Date: 2017-07-21' > > > That doesn't look like a solution to me because x still appears on the > right. > > Is this the intended behavior? > > > Certainly not. Trying with algorithm='sympy' leads to two true solutions in the complex domain: sage: solve(2*(x+sqrt(1-x^2))-7,x, algorithm='sympy') [x == -1/4*I*sqrt(41) + 7/4, x == 1/4*I*sqrt(41) + 7/4] Eric. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at https://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
Re: [sage-support] how to specify a port when running jupyter notebook
Le lundi 4 février 2019 11:16:24 UTC+1, John Cremona a écrit : > > > Although this is obviously a jupyter thing and note a sage specific thing, > I think it would be helpful to have this somewhere in the Sage > documentation (I could not find it) and also visible in the "sage -h" > output. > It is visible by sage -n jupyter -h or equivalently sage -n jupyter --help I agree it would be better to have a link from both "sage -h" and "sage -n -h", or at least a setence like run "sage -n jupyter -h" for all options relative to the Jupyter notebook. Eric. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at https://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
Re: [sage-support] Re: arrows in 3d field plots
Le jeudi 31 janvier 2019 06:52:10 UTC+1, Tevian Dray a écrit :
>
> >> You can use the plot functionality of vector fields on
> >> Euclidean spaces to get better arrowheads:
>
> OK; I can get jmol to work with some browsers, although it is painfully
> slow. But the results are very nice.
>
>
Hopefully, some day threejs will replace jmol as the default 3d viewer:
https://trac.sagemath.org/ticket/22408
> Finally, is there a simple mechanism to enable Sage to plot vector fields
> with singularities, such as a pole at the origin? I've had no luck yet
> trying to plot something like:
> E.vector_field((-y/(x^2+y^2),x/(x^2+y^2)))
> I've tried piecing together nonsingular domains, although I'm possibly not
> doing it correctly. But there is surely a more elegant solution, such as
> cutting off the vector field at some maximum magnitude.
>
The cut off should definitely be added to the plot method of vector fields,
among many other improvements to be done...
Meanwhile, you can define a subdomain of E, U say, where the vector field
is everywhere regular and plot the restriction of the vector field to U.
For your example, U can be E minus the disk x^2+y^2 <= 0.01:
sage: E. = EuclideanSpace()
sage: v = E.vector_field((-y/(x^2+y^2),x/(x^2+y^2)))
sage: U = E.open_subset('U', coord_def={E.cartesian_coordinates():
x^2+y^2>0.01})
sage: v.restrict(U).plot(max_range=1, scale=0.2)
In the above code, "coord_def" stands for the coordinate definition of the
open subset U and "v.restrict(U)" is the restriction of v to U.
Best wishes,
Eric.
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[sage-support] Re: arrows in 3d field plots
Hi, You can use the plot functionality of vector fields on Euclidean spaces to get better arrowheads: sage: E. = EuclideanSpace() sage: v = E.vector_field((x,y,0)) sage: xy = v.plot(max_range=1, color='black') sage: show(xy, orientation=(0,0,0,0)) You may also replace the last line by sage: show(xy, orientation=(0,0,0,0), viewer='threejs') to use threejs instead of jmol. More options of the vector field plot functions are described here, especially to control the arrow size are described here: http://doc.sagemath.org/html/en/reference/manifolds/sage/manifolds/differentiable/vectorfield.html#sage.manifolds.differentiable.vectorfield.VectorField.plot Best wishes, Eric. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at https://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
Re: [sage-support] Re: Cartan moving frame formalism
Le jeudi 6 décembre 2018 17:28:39 UTC+1, Tevian Dray a écrit : > > >> The answer to your question is essentially "yes" ... > > Thank you for your detailed response and links. I had in fact found > some of them when searching, but clearly hadn't read them carefully > enough. In particular, I had missed the use of vector_frame in the > documentation of Affine Connections, although I note that 2 of your > subsequent 3 examples appear to define frames without using this class. > > I expect that these examples will indeed provide the guidance I need, > and will work through them more carefully. > > Again, thank you. > You're welcome. If you find some missing functionalities and you would like to implement them, please visit https://sagemanifolds.obspm.fr/contrib.html Best wishes, Eric. > > Tevian > -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at https://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
[sage-support] Re: Has the Cartan moving frame formalism been implemented in Sage?
The answer to your question is essentially "yes", since Sage can deal with any kind of vector frame, not necessarily coordinate frames, see http://doc.sagemath.org/html/en/reference/manifolds/sage/manifolds/differentiable/vectorframe.html In particular, a connection can be defined by its coefficients with respect to a moving frame; see the documentation of the function "curvature_form" for an example of curvature 2-form expressed in a moving frame: http://doc.sagemath.org/html/en/reference/manifolds/sage/manifolds/differentiable/affine_connection.html At the end of the S^2 example http://nbviewer.jupyter.org/github/sagemanifolds/SageManifolds/blob/master/Worksheets/v1.3/SM_sphere_S2.ipynb you have the computation of the structure coefficients of an orthonormal frame. You have also non-coordinate frames in the S^3 example: http://nbviewer.jupyter.org/github/sagemanifolds/SageManifolds/blob/master/Worksheets/v1.3/SM_sphere_S3_vectors.ipynb An example of curvature 2-form expressed in an orthonormal frame is in cell [87] of this notebook: http://nbviewer.jupyter.org/github/sagemanifolds/SageManifolds/blob/master/Worksheets/v1.3/SM_Schwarzschild.ipynb Best wishes, Eric. Le jeudi 6 décembre 2018 02:10:22 UTC+1, Tevian Dray a écrit : > > Such an implementation would have 2 parts: > > 1. *Defining the objects:* The connection 1-forms, torsion 2-forms, and > curvature 2-forms are all indexed sets of differential forms. They are not > tensorial, but the index labels behave in many ways like tensor components. > In particular, there are "up" and "down" index versions, with particular > symmetries. The case of an orthonormal basis is particularly nice, leading > to "down" index antisymmetry, which it would be nice to have built in. > > 2. *Computing the objects:* The components of the connection 1-forms are > just the Christoffel symbols, but in an arbitrary frame. So when working > with explicit examples, it would be enough to be able to compute the > Christoffel symbols, then use them to determine the connection forms. But > this requires the ability to compute the connection in non-coordinate > frames. > > I'll settle for an implementation of question 2. However, so far as I can > tell, sage.manifolds only calculates in a coordinate basis, and the > VectorFrame class doesn't do tensor derivatives. If I'm missing something > here, or if there's some other known way to work in an arbitrary > (especially orthonormal) basis, please let me know -- ideally with an > example, such as polar coordinates in an orthonormal frame. > > Thank you. > -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at https://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
Re: [sage-support] missing module gmpy2
Le samedi 27 octobre 2018 09:27:21 UTC+2, Dima Pasechnik a écrit : > > These messages can be safely ignored. > > However it's kind of weird to have them all the time... Best regards, Eric. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at https://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
Re: [sage-support] scipy in sage-8.3 fails
Hi Malcolm! Le dimanche 16 septembre 2018 12:17:37 UTC+2, Dima Pasechnik a écrit : > > it appears that you need to install gfortran. > admittedly > http://doc.sagemath.org/html/en/installation/source.html > > is a bit unclear on this. > You may also have a look at the list of Ubuntu 18.04 packages required to build Sage and adapt it to your system (Scientific Linux from the log): https://wiki.sagemath.org/prerequisitesUbuntu Best regards, Eric. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at https://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
[sage-support] Re: simple?--from_meijer in jupyter
Hi,
There is a typo in your code: it should be "from_meijerg" instead of
"from_meijer":
sage: from sympy.holonomic.holonomic import from_meijerg
sage: from_meijerg?
Signature: from_meijerg(func, x0=0, evalf=False, initcond=True, domain=QQ)
Docstring:
Converts a Meijer G-function to Holonomic. "func" is the G-Function
and "x0" is the point at which initial conditions are required.
>>> from sympy.holonomic.holonomic import from_meijerg,
DifferentialOperators
>>> from sympy import symbols, meijerg, S
>>> x = symbols('x')
>>> from_meijerg(meijerg(([], []), ([S(1)/2], [0]), x**2/4))
HolonomicFunction((1) + (1)*Dx**2, x, 0, [0, 1/sqrt(pi)])
Init docstring: x.__init__(...) initializes x; see help(type(x)) for
signature
File: ~/sage/8.1/local/lib/python2.7/site-packages/sympy/holonomic/holonomic
.py
Type: function
Best wishes,
Eric.
Le vendredi 13 avril 2018 00:06:17 UTC+2, Raymond Rogers a écrit :
>
> The sympy documentation
> http://docs.sympy.org/latest/modules/holonomic/convert.html
> has the function from_meiljer and I do
> from sympy import *
> from sympy.holonomic.holonomic import from_hyper, from_meijer,
> DifferentialOperators
> (I think redundant)
> I get: "ImportError: cannot import name from_meijer"
> Is this a versioning error or what?
>
>
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[sage-support] Re: plot3d renders heaviside(x) but not heaviside(x-y)
A workaround is to use unit_step instead of heaviside: plot3d(unit_step(x-y),(x,-1,1),(y,-1,1)) The function heaviside is known to have issues as soon as some numerical evaluation is required. Another example is: numerical_integral(heaviside(x), -1, 1) TypeError: unable to simplify to float approximation numerical_integral(unit_step(x), -1, 1) (1.0, 1.1102230246251565e-14) Best wishes, Eric. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at https://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
[sage-support] Re: password
Run a sage session in a terminal and type: sage: notebook(reset=True) More details at https://ask.sagemath.org/question/26043/forgotten-notebook-password/ Eric. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at https://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
[sage-support] Re: formal sets
Hi, Le dimanche 5 novembre 2017 15:14:16 UTC+1, Ralf Stephan a écrit : > > A bit more tricky are the reals: > sage: Set(RealSet(-oo,oo)) > Set of elements of (-oo, +oo) > > Well, this one is maybe too tricky: sage: R = Set(RealSet(-oo,oo)) sage: R.an_element() (-oo, +oo) ??? In passing, we may also note that sage: RealSet(-oo,+oo).an_element() ... SignError: cannot add infinity to minus infinity Eric. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at https://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
[sage-support] Re: 3d plotting in CoCalc with SageMath 8.0
Hi, You must add the keyword argument online=True to show(...): show(surface.plot(aspect_ratio=1, color='yellow'), viewer='threejs', online= True) Then it works in a Jupyter notebook running SageMath 8.0 in CoCalc: https://cocalc.com/projects/551a1e1d-9360-47bf-89ba-91603e96c7fe/files/2017-10-29-20.ipynb More generally online=True (which was introduced in SageMath 8.0) is necessary to share threejs plots on the web, e.g. via nbviewer.jupyter.org. Eric. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at https://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
[sage-support] Re: Define Alphanumeric variable in sage
Something like
sage: for n in range(10):
: exec("x{} = {}".format(n, n))
:
should do the job.
Eric.
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Re: [sage-support] For info ?
Thank you Jan for having maintained the PPA during all these years! Best regards, Eric. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at https://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
[sage-support] Re: Assuming a function is constant in computing later expressions
What about something like:
sage: t = var('t')
sage: Omega = function('Omega')
sage: quanti = Omega(t)*cos(t) + diff(Omega(t), t)
sage: quanti
Omega(t)*cos(t) + diff(Omega(t), t)
sage: Omega0 = var('Omega0')
sage: Omega_const(t) = Omega0
sage: quanti.substitute_function(Omega, Omega_const)
Omega0*cos(t)
Eric.
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[sage-support] Re: Here is an example
Nice answer Nils! -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at https://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
[sage-support] Re: Further on plotting functions
Le lundi 26 juin 2017 13:05:27 UTC+2, Fjordforsk A/S a écrit : > > Hello, I tried a different variant of the previous plot: > > def f(x,y): > return math.sqrt(2**3))*exp(-(x**2 + y**2) > P = plot3d(f,(-3,3),(-3,3), adaptive=True, color=rainbow(60, 'rgbtuple'), > max_bend=.1, max_depth=15) > P.show() > > however, this also does not show. > > Works for me, provided the parentheses in the definition of f are well placed: def f(x,y): return math.sqrt(2**3)*exp(-(x**2 + y**2)) Best wishes, Eric. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at https://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
[sage-support] Re: Plottig functions
Hi, Le lundi 26 juin 2017 12:31:44 UTC+2, Fjordforsk A/S a écrit : > > Hello, I am having trouble plotting this function: > > sage: plot3d((math.sqrt(2**3))*math.exp(-(x**2 + y**2)), (x, 0, 5 ), (y, > 0, 5)) > > > Do not use the exp from the math module, but directly Sage's function exp: plot3d((sqrt(2**3))*exp(-(x**2 + y**2)), (x, 0, 5 ), (y, 0, 5)) Best wishes, Eric. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at https://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
[sage-support] Error Building Sage 7.6 in Ubuntu
Dear all, I am having trouble in installing Sage 7.6, in Ubuntu 14.04. Could anyone help? Here is the message. Thank you all. Eric [sagelib-7.6] make[3]: Entering directory `/home/eric/Sage/SageMath/src' [sagelib-7.6] (cd .\ [sagelib-7.6] && export SAGE_ROOT=/doesnotexist\ [sagelib-7.6]SAGE_SRC=/doesnotexist\ [sagelib-7.6]SAGE_SRC_ROOT=/doesnotexist\ [sagelib-7.6]SAGE_DOC_SRC=/doesnotexist\ [sagelib-7.6]SAGE_SCRIPTS_DIR=/doesnotexist\ [sagelib-7.6]SAGE_BUILD_DIR=/doesnotexist\ [sagelib-7.6]SAGE_PKGS=/home/eric/Sage/SageMath/build/pkgs\ [sagelib-7.6] SAGE_CYTHONIZED=/home/eric/Sage/SageMath/src/build/cythonized \ [sagelib-7.6] && python -u setup.py --no-user-cfg build install) [sagelib-7.6] /home/eric/Sage/SageMath/local/bin/python: 1: /home/eric/Sage/SageMath/local/bin/python: Syntax error: word unexpected (expecting ")") [sagelib-7.6] make[3]: *** [sage] Error 2 [sagelib-7.6] make[3]: Leaving directory `/home/eric/Sage/SageMath/src' [sagelib-7.6] [sagelib-7.6] real0m0.017s [sagelib-7.6] user0m0.000s [sagelib-7.6] sys0m0.000s make[2]: *** [sagelib] Error 2 make[2]: Leaving directory `/home/eric/Sage/SageMath/build/make' make[1]: *** [all] Error 2 make[1]: Leaving directory `/home/eric/Sage/SageMath/build/make' real0m0.441s user0m0.064s sys0m0.084s *** Error building Sage. The following package(s) may have failed to build (not necessarily during this run of 'make all'): The build directory may contain configuration files and other potentially helpful information. WARNING: if you now run 'make' again, the build directory will, by default, be deleted. Set the environment variable SAGE_KEEP_BUILT_SPKGS to 'yes' to prevent this. make: *** [all] Error 1 -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at https://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
[sage-support] Error Building Sage 7.6
Dear all, I am new to Sage. In installation part, I've got this message when building the Sage. Could you please help me? Thank you very much. make build/make/Makefile make[1]: Entering directory `/home/eric/Sage/SageMath' make[1]: `build/make/Makefile' is up to date. make[1]: Leaving directory `/home/eric/Sage/SageMath' build/bin/sage-logger \ "cd build/make && ./install 'all'" logs/install.log *** ALL ENVIRONMENT VARIABLES BEFORE BUILD: *** CLUTTER_IM_MODULE=xim COLORTERM=gnome-terminal COMPIZ_CONFIG_PROFILE=ubuntu DBUS_SESSION_BUS_ADDRESS=unix:abstract=/tmp/dbus-XWvPOj2kHc DEFAULTS_PATH=/usr/share/gconf/ubuntu.default.path DESKTOP_SESSION=ubuntu DISPLAY=:0 GDM_LANG=en_US GDMSESSION=ubuntu GNOME_DESKTOP_SESSION_ID=this-is-deprecated GNOME_KEYRING_CONTROL=/run/user/1000/keyring-Ku5pqL GNOME_KEYRING_PID=1767 GPG_AGENT_INFO=/run/user/1000/keyring-Ku5pqL/gpg:0:1 GTK_IM_MODULE=ibus GTK_MODULES=overlay-scrollbar:unity-gtk-module HOME=/home/eric IM_CONFIG_PHASE=1 INSTANCE=Unity JOB=gnome-session LANG=en_US.UTF-8 LANGUAGE=en_US LESSCLOSE=/usr/bin/lesspipe %s %s LESSOPEN=| /usr/bin/lesspipe %s LOGNAME=eric LS_COLORS=rs=0:di=01;34:ln=01;36:mh=00:pi=40;33:so=01;35:do=01;35:bd=40;33;01:cd=40;33;01:or=40;31;01:su=37;41:sg=30;43:ca=30;41:tw=30;42:ow=34;42:st=37;44:ex=01;32:*.tar=01;31:*.tgz=01;31:*.arj=01;31:*.taz=01;31:*.lzh=01;31:*.lzma=01;31:*.tlz=01;31:*.txz=01;31:*.zip=01;31:*.z=01;31:*.Z=01;31:*.dz=01;31:*.gz=01;31:*.lz=01;31:*.xz=01;31:*.bz2=01;31:*.bz=01;31:*.tbz=01;31:*.tbz2=01;31:*.tz=01;31:*.deb=01;31:*.rpm=01;31:*.jar=01;31:*.war=01;31:*.ear=01;31:*.sar=01;31:*.rar=01;31:*.ace=01;31:*.zoo=01;31:*.cpio=01;31:*.7z=01;31:*.rz=01;31:*.jpg=01;35:*.jpeg=01;35:*.gif=01;35:*.bmp=01;35:*.pbm=01;35:*.pgm=01;35:*.ppm=01;35:*.tga=01;35:*.xbm=01;35:*.xpm=01;35:*.tif=01;35:*.tiff=01;35:*.png=01;35:*.svg=01;35:*.svgz=01;35:*.mng=01;35:*.pcx=01;35:*.mov=01;35:*.mpg=01;35:*.mpeg=01;35:*.m2v=01;35:*.mkv=01;35:*.webm=01;35:*.ogm=01;35:*.mp4=01;35:*.m4v=01;35:*.mp4v=01;35:*.vob=01;35:*.qt=01;35:*.nuv=01;35:*.wmv=01;35:*.asf=01;35:*.rm=01;35:*.rmvb=01;35:*.flc=01;35:*.avi=01;35:*.fli=01;35:*.flv=01;35:*.gl=01;35:*.dl=01;35:*.xcf=01;35:*.xwd=01;35:*.yuv=01;35:*.cgm=01;35:*.emf=01;35:*.axv=01;35:*.anx=01;35:*.ogv=01;35:*.ogx=01;35:*.aac=00;36:*.au=00;36:*.flac=00;36:*.mid=00;36:*.midi=00;36:*.mka=00;36:*.mp3=00;36:*.mpc=00;36:*.ogg=00;36:*.ra=00;36:*.wav=00;36:*.axa=00;36:*.oga=00;36:*.spx=00;36:*.xspf=00;36: MAKEFLAGS= MAKELEVEL=1 MAKE=make MANDATORY_PATH=/usr/share/gconf/ubuntu.mandatory.path MFLAGS= PATH=/home/eric/Sage/SageMath/build/bin:/home/eric/Sage/SageMath/src/bin:/home/eric/Sage/SageMath/local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games PWD=/home/eric/Sage/SageMath/build/make PYTHONPATH=/home/eric/Sage/SageMath/local QT4_IM_MODULE=xim QT_IM_MODULE=ibus QT_QPA_PLATFORMTHEME=appmenu-qt5 SAGE_EXTCODE=/home/eric/Sage/SageMath/local/share/sage/ext SAGE_LOCAL=/home/eric/Sage/SageMath/local SAGE_LOGS=/home/eric/Sage/SageMath/logs/pkgs SAGE_ORIG_PATH_SET=True SAGE_ORIG_PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games SAGE_ROOT=/home/eric/Sage/SageMath SAGE_SHARE=/home/eric/Sage/SageMath/local/share SAGE_SPKG_INST=/home/eric/Sage/SageMath/local/var/lib/sage/installed SAGE_SRC=/home/eric/Sage/SageMath/src SAGE_VERSION=7.6 SELINUX_INIT=YES SESSIONTYPE=gnome-session SHELL=/bin/bash SHLVL=3 SSH_AUTH_SOCK=/run/user/1000/keyring-Ku5pqL/ssh TERM=xterm TEXTDOMAINDIR=/usr/share/locale/ TEXTDOMAIN=im-config UPSTART_EVENTS=started starting UPSTART_INSTANCE= UPSTART_JOB=unity-settings-daemon UPSTART_SESSION=unix:abstract=/com/ubuntu/upstart-session/1000/1771 USER=eric _=/usr/bin/env V=1 VTE_VERSION=3409 WINDOWID=58720268 XAUTHORITY=/home/eric/.Xauthority XDG_CONFIG_DIRS=/etc/xdg/xdg-ubuntu:/usr/share/upstart/xdg:/etc/xdg XDG_CURRENT_DESKTOP=Unity XDG_DATA_DIRS=/usr/share/ubuntu:/usr/share/gnome:/usr/local/share/:/usr/share/ XDG_GREETER_DATA_DIR=/var/lib/lightdm-data/eric XDG_RUNTIME_DIR=/run/user/1000 XDG_SEAT_PATH=/org/freedesktop/DisplayManager/Seat0 XDG_SEAT=seat0 XDG_SESSION_ID=c2 XDG_SESSION_PATH=/org/freedesktop/DisplayManager/Session0 XDG_VTNR=7 XMODIFIERS=@im=ibus *** make[1]: Entering directory `/home/eric/Sage/SageMath/build/make' make base make[2]: Entering directory `/home/eric/Sage/SageMath/build/make' make[2]: Nothing to be done for `base'. make[2]: Leaving directory `/home/eric/Sage/SageMath/build/make' env SAGE_BUILD_TOOLCHAIN=yes make toolchain make[2]: Entering directory `/home/eric/Sage/SageMath/build/make' make[2]: Nothing to be done for `toolchain'. make[2]: Leaving directory `/home/eric/Sage/SageMath/build/make' make toolchain-deps make[2]: Entering directory `/home/eric/Sage/SageMath/build/make' make /home/eric/Sage/SageMath/local/var/lib/sage/installed/zlib-1.2.8.p0 make[3]: Entering directory `/home/eric/Sage/SageMath/build/make' make[3]: `/home/
[sage-support] Re: uploaded ipynb file not accessible
Hi, Le jeudi 4 mai 2017 03:38:56 UTC+2, Jim Mooney a écrit : > > I uploaded an ipynb file to the localhost browser, assuming I could use it > as a normal notebook, but it's just in a box, highlighted and I can't open > or do anything with it. When I reloaded the browser it disappeared. What am > I missing? > After having selected the file from the file browser and clicked on "open", have you clicked on the "Upload" blue button on the right ? (it might indeed be quite disturbing to have such a 2-stage procedure just for adding a new ipynb file). Best wishes, Eric. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at https://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
[sage-support] Re: integrate problem (bug?)
This is fixed in Sage 7.6.beta2: ┌┐ │ SageMath version 7.6.beta2, Release Date: 2017-02-01 │ │ Type "notebook()" for the browser-based notebook interface.│ │ Type "help()" for help.│ └┘ ┏┓ ┃ Warning: this is a prerelease version, and it may be unstable. ┃ ┗┛ sage: integrate(x/(1+x^2),x,0,infinity) --- ValueErrorTraceback (most recent call last) ... ValueError: Integral is divergent. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at https://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
[sage-support] Reconstructing a symbolic expression with derivative from the string representation
Hi,
I am puzzled by the following code in sage 7.5:
sage: df = diff(function('f')(x), x); df
diff(f(x), x)
sage: repr(df)
'diff(f(x), x)'
sage: df1 = SR(repr(df)); df1
diff(f(x), x)
df and df1 look the same and we even have
sage: bool(df1 == df)
True
However, they are not identical:
sage: latex(df)
\frac{\partial}{\partial x}f\left(x\right)
sage: latex(df1)
{\rm diff}\left(f\left(x\right), x\right)
sage: df.operator()
D[0](f)
sage: df1.operator()
diff
sage: diff(df, x)
diff(f(x), x, x)
sage: diff(df1, x)
D[0](diff)(f(x), x)*diff(f(x), x) + D[1](diff)(f(x), x)
Any thoughts? Shouldn't SR(repr(df)) always give back df? If not, how to
recover df from repr(df) in the current case?
Eric.
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[sage-support] Re: Ssh problems
Hi, Le mardi 21 février 2017 18:49:08 UTC+1, Simon King a écrit : > > Hi! > > Trying to follow the advices in "Git the Hard Way", I did > git clone git://github.com/sagemath/sage.git > > What about git clone https://github.com/sagemath/sage.git (note the change "git:" --> "https:") Does it work better for you ? Best regards, Eric. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at https://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
