[sage-support] Re: feature request - worksheets labels.
On 1 Lut, 00:34, William Stein wst...@gmail.com wrote: 2010/1/31 Kakaz kazimierz.k...@gmail.com: I have several worksheets in my sage, and when I have some new ideas I create other one, somethimes just for fun. So there are worksheets named: Idea 1, Matrices, 'FFT, FFT3 etc. After a month I do not remember what is inside. Of course I may open them and check, but I thing that there should be something better to depict my worksheets. Folders would be interesting in order to do that, but in fact I mean something like labels. Like comments in Excel - something what You see, when You point with mouse cursor to worksheet name, and what normally is not visible, You only see it, when You stay with cursor on worksheet name for example for 1 second, without clicking, or entering workseet. I thought it would be useful, because You do not have to open worksheet in order to have an idea what is inside... As a temporary workaround you might note the following: (1) From the home screen (the list of all worksheets), you can do a fulltext search of the *contents* of all worksheets by typing a list of words in the upper right text box and clicking Search Worksheets. (2) You could put text in the worksheets themselves such as label:foo or something, then search for label:foo to find only such worksheets. William Thanks a lot! I have a habit to name worksheet with long names, which is enough for me right now. But I suppose, when You have several fields of activity, some examples imported from web etc. having labels would be very useful feature, and I suppose developing effort would be not so high to get this. Best Regards Kazek -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: resultant
Hi Michael, On Feb 1, 2:37 am, Michael Beeson profbee...@gmail.com wrote: I let Mathematica run a similar problem for 36 hours with no reply; but I don't understand why it's too difficult. Indeed, not easy. By the way, in your first example, you defined sage: R.z,p,q = QQ[] sage: a = z^2 - z^-2 sage: f = z^2 *(p-a) At that point, f is not considered a polynomial, although f does not contain negative powers. You asked how to make Sage know that f is a polynomial. Here you are: sage: f = R(f) sage: f.resultant(z-p) -p^4 + p^3 + 1 Cheers, Simon -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: Sage in calculators
On Feb 1, 4:59 am, Cal Armstrong sig...@gmail.com wrote: I would rather see it ported to a device that students already have, their smartphones, instead of saddling them with the purchase of another device. I just want to add that it is already possible to run sympy (pure python) inside android's python scripting environment. Hence, you can already do some symbolics in ipython, which is quite nice ;) H -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: sage blog
On Feb 1, 3:12 am, Minh Nguyen nguyenmi...@gmail.com wrote: In its current state, there is no automatic way for me to configure Planet Sage to automatically get Sage specific topics from your blog. I tried to create a yahoo pipe with filtering by item.title, but it doesn't work. I think the rss feed is a bit broken? ... http://pipes.yahoo.com/pipes/pipe.info?_id=a4c8fae514255ed80b8b08190bf381f6 h -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Listing all k-minors of a matrix?
Hi all, Is there a way to get all the k-minors of a matrix as a list of matrices? Currently there is a method M.minors(2), but this only produces the list of determinants. What about the matrices themselves? Obviously, Sage must have them somewhere internally to compute the determinants, but how to get access to them? Best regards, Jan -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: Listing all k-minors of a matrix?
You can see the source of the minors method using sage: M.minors?? (you need to have defined M beforehand). By browsing at that source one can easily find the general way of doing it: sage: A = Matrix(QQ, 3, [1,2,3,4,5,6,7,8,9]) sage: [A.matrix_from_rows_and_columns(rows, cols) for cols in combinations_iterator(range(A.ncols()), 2) for rows in combinations_iterator(range(A.nrows()),2)] [ [1 2] [1 2] [4 5] [1 3] [1 3] [4 6] [2 3] [2 3] [5 6] [4 5], [7 8], [7 8], [4 6], [7 9], [7 9], [5 6], [8 9], [8 9] ] Cheers J On Feb 1, 12:10 pm, janwil jan.willem...@gmail.com wrote: Hi all, Is there a way to get all the k-minors of a matrix as a list of matrices? Currently there is a method M.minors(2), but this only produces the list of determinants. What about the matrices themselves? Obviously, Sage must have them somewhere internally to compute the determinants, but how to get access to them? Best regards, Jan -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] exponential and simplify
Hi, this is hopefully an easy question:
As a simple exercise, I'm trying to show that \int_0^{2\pi} e^{i (m-n)
x}dx = 2\pi\delta_{mn} for integer m, n.
Here's how I did it:
sage: var('m,n'); w = SR.wild(0);
sage: assume(n, 'integer');assume(m, 'integer')
sage: int = integrate(e^(i*(m-n)*x),x,0,2*pi)
sage: print int.limit(m=n)
sage: print int.subs({e^(w):cosh(w)+sinh(w)}).simplify_trig()
2*pi
0
The bit I don't like is using the substitution... it should not be
nesc. The problem, I think, lies at
sage: sin(2*pi*n).simplify_trig() # this works
sage: e^(i*2*pi*m).simplify_full() # this doesn't work
0
e^(2*I*pi*m)
Any suggestions?
--
To post to this group, send email to sage-support@googlegroups.com
To unsubscribe from this group, send email to
sage-support+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/sage-support
URL: http://www.sagemath.org
[sage-support] Sage Virtualbox missing vboxfs
I am running (Vista) the Virtualbox with sange appliance (sage-virtualbox-4.2.1.p1.zip) and it works nicely. But I would like to use a local Vista-directory to exchange files. Now the problem, ONCE I succeeded to use c:\01sage to save a picture using sudo mount -t vboxfs ... But a second time I allways get a FATAL error vboxfs module not found. Installing the Guestaddition (gives advice not to run) but I did nevertheless did not help I have a workaround: ftp to my website and back ... but the direct possibility is so much more comfort ;-) Ideas are apreciated Peter (=PKHG) -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: exponential and simplify
On Feb 1, 10:47 am, Simon simonjty...@gmail.com wrote:
Hi, this is hopefully an easy question:
As a simple exercise, I'm trying to show that \int_0^{2\pi} e^{i (m-n)
x}dx = 2\pi\delta_{mn} for integer m, n.
Here's how I did it:
sage: var('m,n'); w = SR.wild(0);
sage: assume(n, 'integer');assume(m, 'integer')
sage: int = integrate(e^(i*(m-n)*x),x,0,2*pi)
sage: print int.limit(m=n)
sage: print int.subs({e^(w):cosh(w)+sinh(w)}).simplify_trig()
2*pi
0
The bit I don't like is using the substitution... it should not be
nesc. The problem, I think, lies at
sage: sin(2*pi*n).simplify_trig() # this works
sage: e^(i*2*pi*m).simplify_full() # this doesn't work
0
e^(2*I*pi*m)
Any suggestions?
Our assumption framework is directly from Maxima. Perhaps Maxima does
not simplify exponentials in these cases? It would be worth checking
whether there is another simplification routine there we have missed,
though perhaps Maxima intentionally does not have this simplification.
Unfortunately, progress on this in Sage has stopped until people can
agree on a way to reorganize the simplification wrappers from Maxima.
- kcrisman
--
To post to this group, send email to sage-support@googlegroups.com
To unsubscribe from this group, send email to
sage-support+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/sage-support
URL: http://www.sagemath.org
[sage-support] Runtime error: Unable to start gap (as user nobody with xgrid)
Hi,
I'm currently using xgrid for my computations... Here is the setup:
We have multiple imac OS 10.6, a intel server with mac OS 10.5 and two
G5 mac (10.5). All of them have sage4.3 (or 4.3.1) binary build.
In order for us to make xgrid work with sage, we gave some more rights
for user nobody. (We copied /usr/share/sandbox/
xgridagentd_task_somebody.sb over xgridagentd_task_nobody.sb. So now
xgrid can execute sage anywhere on the disk)
We created a batch job ( a .plist file) to send to xgrid. The tasks
are .sh files containing the lines:
--
#!/bin/bash
export HOME=`pwd`
/usr/local/bin/sage Script.sage
--
and Script.sage contains the line:
--
load My_module.py
Fonction(int1,int2,int3)
--
The Script.py generated file (located on the agent's disk) is then:
--
# This file was *autogenerated* from the file Script.sage.
from sage.all_cmdline import * # import sage library
_sage_const_int1 = Integer(int1); _sage_const_int2 = Integer(int2);
_sage_const_int3 = Integer(int3)
execfile(My_module.py)
Fonction(_sage_const_int1 ,_sage_const_int2 ,_sage_const_int3 )
--
Now, we send the batch job to xgrid. The intel server does everything
OK, so as the G5. But all the imac give the following error:
WARNING: There is one major unsolved bug in some versions of
Sage on OS X 10.6 that causes an 'Abort trap' crash when
doing certain symbolic computations.
See http://trac.sagemath.org/sage_trac/ticket/7095/.
Setting permissions of DOT_SAGE directory so only you can read and
write it.
Traceback (most recent call last):
File Script.py, line 2, in module
from sage.all_cmdline import * # import sage library
File /Library/sage/local/lib/python2.6/site-packages/sage/
all_cmdline.py, line 14, in module
from sage.all import *
File /Library/sage/local/lib/python2.6/site-packages/sage/all.py,
line 64, in module
from sage.misc.all import * # takes a while
File /Library/sage/local/lib/python2.6/site-packages/sage/misc/
all.py, line 70, in module
from sage_input import sage_input
File /Library/sage/local/lib/python2.6/site-packages/sage/misc/
sage_input.py, line 163, in module
from sage.misc.functional import parent
File /Library/sage/local/lib/python2.6/site-packages/sage/misc/
functional.py, line 37, in module
from sage.rings.complex_double import CDF
File complex_double.pyx, line 88, in init
sage.rings.complex_double (sage/rings/complex_double.c:13660)
File /Library/sage/local/lib/python2.6/site-packages/sage/rings/
complex_field.py, line 86, in ComplexField
C = ComplexField_class(prec)
File /Library/sage/local/lib/python2.6/site-packages/sage/rings/
complex_field.py, line 177, in __init__
self._populate_coercion_lists_(coerce_list=[complex_number.RRtoCC
(self._real_field(), self)])
File complex_number.pyx, line 2003, in
sage.rings.complex_number.RRtoCC.__init__ (sage/rings/complex_number.c:
12936)
File map.pyx, line 41, in sage.categories.map.Map.__init__ (sage/
categories/map.c:1962)
File /Library/sage/local/lib/python2.6/site-packages/sage/
categories/homset.py, line 152, in Hom
H = category.hom_category().parent_class(X, Y, category =
category)
File /Library/sage/local/lib/python2.6/site-packages/sage/
categories/rings.py, line 117, in __new__
from sage.rings.homset import RingHomset
File /Library/sage/local/lib/python2.6/site-packages/sage/rings/
homset.py, line 17, in module
import quotient_ring
File /Library/sage/local/lib/python2.6/site-packages/sage/rings/
quotient_ring.py, line 32, in module
import sage.rings.polynomial.multi_polynomial_ideal
File /Library/sage/local/lib/python2.6/site-packages/sage/rings/
polynomial/multi_polynomial_ideal.py, line 229, in module
from sage.interfaces.all import (singular as singular_default,
File /Library/sage/local/lib/python2.6/site-packages/sage/
interfaces/all.py, line 8, in module
from gap import gap, gap_reset_workspace, gap_console,
gap_version, is_GapElement, Gap
File /Library/sage/local/lib/python2.6/site-packages/sage/
interfaces/gap.py, line 987, in module
gap_reset_workspace(verbose=False)
File /Library/sage/local/lib/python2.6/site-packages/sage/
interfaces/gap.py, line 978, in gap_reset_workspace
g.eval('SaveWorkspace(%s);'%WORKSPACE)
File /Library/sage/local/lib/python2.6/site-packages/sage/
interfaces/gap.py, line 480, in eval
result = Expect.eval(self, input_line, **kwds)
File /Library/sage/local/lib/python2.6/site-packages/sage/
interfaces/expect.py, line 983, in eval
return '\n'.join([self._eval_line(L, **kwds) for L in code.split
('\n') if L != ''])
File /Library/sage/local/lib/python2.6/site-packages/sage/
interfaces/gap.py, line 685, in _eval_line
self._start()
File /Library/sage/local/lib/python2.6/site-packages/sage/
interfaces/gap.py, line 362, in _start
Re: [sage-support] Runtime error: Unable to start gap (as user nobody with xgrid)
Hi, On Tue, Feb 2, 2010 at 5:29 AM, jplab jeanphilippela...@gmail.com wrote: SNIP My computation are considerably slowed down by this bug and I would be very happy to find a solution! Help! If you need more info, let me know! My best guess is that mixing Sage 4.3 and 4.3.1 with Mac OS X 10.5 and 10.6 can be problematic. As you know, Sage versions prior to 4.3.1 were unstable on Mac OS X 10.6 due to how Python was compiled on that platform. As of Sage 4.3.1, Python is now configured to properly compile on Mac OS X 10.6, which got rid of the annoying bug tracked at ticket #7095 [1]. One solution would be to use Sage 4.3.1 for all your Mac OS X 10.6 machines, or indeed for all your Mac OS X machines. Hope that helps. [1] http://trac.sagemath.org/sage_trac/ticket/7095 -- Regards Minh Van Nguyen -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: ubuntu 9.1 installation trouble
Thanks to all who helped yesterday, MS in particular. Using sudo aptitude install build-essential (instead of apt-get or synaptic manager) downgraded the gcc and libraries to 4.4.1-4ubuntu8 so the dependencies all worked. Then gfortran came in without a hitch and Sage is running from a pre-compiled binary. Thank you all again. Sage on. (Is there a way to mark this thread as solved?) --kitz On Jan 31, 5:37 pm, kitz kmphi...@gmail.com wrote: Thank you William (Dr. Stein?) I seem to have a particular snag here. Not sure why. k...@bart:~$ sudo apt-get install gfortran [sudo] password for kitz: Reading package lists... Done Building dependency tree Reading state information... Done Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation: The following packages have unmet dependencies: gfortran: Depends: gfortran-4.4 (= 4.4.1-1) but it is not going to be installed E: Broken packages k...@bart:~$ When I try to install gfortran-4.4 I get another Broken packages result. The following packages have unmet dependencies: gfortran-4.4: Depends: gcc-4.4-base (= 4.4.1-4ubuntu8) but 4.4.1-4ubuntu9 is to be installed Depends: gcc-4.4 (= 4.4.1-4ubuntu8) but 4.4.1-4ubuntu9 is to be installed Depends: libgfortran3 (= 4.4.1-4ubuntu8) but it is not going to be installed E: Broken packages So it seems I am in a loop. Glad to know it works for your systems...I would like to have installs predictable (easy) for teaching purposes. --kitz On Jan 31, 3:40 pm, William Stein wst...@gmail.com wrote: On 1/31/10, kitz kmphi...@gmail.com wrote: Hello, The old ubuntu apt-get packages are broken (I would help if I knew how...if I can donate time am happy to do so, but would need instruction as will be evident from my problem.) The gfortran packages are also broken on Ubuntu repositories. apt-get install gfortran Works fine for me on all my (many!) ubuntu 9.10 installs. Downloaded sage-4.3.1-linux-Ubuntu_9.10-x86_64-Linux.tar.lzma from JMU- VA. Checked md5sum. Unpacked to home folder. Renamed to sage. From terminal ./sage gives error: k...@bart:~/sage$ ./sage -- | Sage Version 4.3.1, Release Date: 2010-01-20 | | Type notebook() for the GUI, and license() for information. | -- /home/kitz/sage/local/bin/python: 1: Syntax error: word unexpected (expecting )) k...@bart:~/sage$ So I can not run Sage at all. Thanks for any guidance. kitz -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL:http://www.sagemath.org -- William Stein Associate Professor of Mathematics University of Washingtonhttp://wstein.org -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: Runtime error: Unable to start gap (as user nobody with xgrid)
Hi, On 1 fév, 14:01, Minh Nguyen nguyenmi...@gmail.com wrote: Hi, On Tue, Feb 2, 2010 at 5:29 AM, jplab jeanphilippela...@gmail.com wrote: SNIP My computation are considerably slowed down by this bug and I would be very happy to find a solution! Help! If you need more info, let me know! My best guess is that mixing Sage 4.3 and 4.3.1 with Mac OS X 10.5 and 10.6 can be problematic. As you know, Sage versions prior to 4.3.1 were unstable on Mac OS X 10.6 due to how Python was compiled on that platform. As of Sage 4.3.1, Python is now configured to properly compile on Mac OS X 10.6, which got rid of the annoying bug tracked at ticket #7095 [1]. One solution would be to use Sage 4.3.1 for all your Mac OS X 10.6 machines, or indeed for all your Mac OS X machines. Hope that helps. Good, we will try that by changing the image on all the Mac... But what is annoying is that on the intel server with 10.5 and sage 4.3, it does work! But I hope 10.6 sage4.3.1 will solve the problem! [1]http://trac.sagemath.org/sage_trac/ticket/7095 -- Regards Minh Van Nguyen Thanks! I will keep you posted on that. JP Labbé -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
Re: [sage-support] Re: ubuntu 9.1 installation trouble
Hi kitz, On Tue, Feb 2, 2010 at 6:35 AM, kitz kmphi...@gmail.com wrote: SNIP Thank you all again. Sage on. Glad to know it works out for you. (Is there a way to mark this thread as solved?) I'm not aware of anything like that for email threads on Google groups. -- Regards Minh Van Nguyen -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
Re: [sage-support] Re: Runtime error: Unable to start gap (as user nobody with xgrid)
Hi, 2010/2/2 jplab jeanphilippela...@gmail.com: SNIP But what is annoying is that on the intel server with 10.5 and sage 4.3, it does work! I think that is expected. The bug at http://trac.sagemath.org/sage_trac/ticket/7095 only affects Mac OS X 10.6. You should have no trouble using Sage 4.3 on Mac OS X 10.5. -- Regards Minh Van Nguyen -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: Runtime error: Unable to start gap (as user nobody with xgrid)
Greetings, On 1 fév, 14:44, Minh Nguyen nguyenmi...@gmail.com wrote: SNIP I think that is expected. The bug at http://trac.sagemath.org/sage_trac/ticket/7095 only affects Mac OS X 10.6. You should have no trouble using Sage 4.3 on Mac OS X 10.5. Oh, I see! Great! Thanks again! JP Labbé -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
Re: [sage-support] Cython Installation Problem with suse 10.1
On Jan 31, 2010, at 2:23 PM, ulrich.t...@hsnr.de wrote: Hi, I got a problem with the insatllation of sage-4.3.1. I am using Suse 10.1 on a Dell Latitude Laptop. Excerpt from the install.log: building 'Cython.Compiler.Parsing' extension gcc -fno-strict-aliasing -DNDEBUG -g -O3 -Wall -Wstrict-prototypes - fPIC -I/root/software/Mathematik/sage-4.3.1/local/include/python2.6 -c /root/software/Mathematik/sage-4.3.1/spkg/build/cython-0.12/src/ Cython/Compi ler/Parsing.c -o build/temp.linux-i686-2.6/root/software/Mathematik/sage-4.3.1/spkg/ build/cyt hon-0.12/src/Cython/Compiler/Parsing.o /root/software/Mathematik/sage-4.3.1/spkg/build/cython-0.12/src/ Cython/Compi ler/Parsing.c:49486: warning: ‘__pyx_pf_6Cython_8Compiler_8Scanning_12PyrexScanner_14included_files___get_ _’ defined but not used /root/software/Mathematik/sage-4.3.1/spkg/build/cython-0.12/src/ Cython/Compi ler/Parsing.c:49502: warning: ‘__pyx_pf_6Cython_8Compiler_8Scanning_12PyrexScanner_14included_files___set_ _’ defined but not used /root/software/Mathematik/sage-4.3.1/spkg/build/cython-0.12/src/ Cython/Compi ler/Parsing.c:49531: warning: ‘__pyx_pf_6Cython_8Compiler_8Scanning_12PyrexScanner_17indentation_stack___g et__’ defined but not used /root/software/Mathematik/sage-4.3.1/spkg/build/cython-0.12/src/ Cython/Compi ler/Parsing.c:49547: warning: ‘__pyx_pf_6Cython_8Compiler_8Scanning_12PyrexScanner_17indentation_stack___s et__’ defined but not used /root/software/Mathematik/sage-4.3.1/spkg/build/cython-0.12/src/ Cython/Compi ler/Parsing.c:49576: warning: ‘__pyx_pf_6Cython_4Plex_8Scanners_7Scanner_5queue___get__’ defined but not used /root/software/Mathematik/sage-4.3.1/spkg/build/cython-0.12/src/ Cython/Compi ler/Parsing.c:49592: warning: ‘__pyx_pf_6Cython_4Plex_8Scanners_7Scanner_5queue___set__’ defined but not used /root/software/Mathematik/sage-4.3.1/spkg/build/cython-0.12/src/ Cython/Compi ler/Parsing.c: In function ‘__pyx_f_6Cython_8Compiler_7Parsing_p_positional_and_keyword_args’: /root/software/Mathematik/sage-4.3.1/spkg/build/cython-0.12/src/ Cython/Compi ler/Parsing.c:31519: internal compiler error: in merge_alias_info, at tree-ssa-copy.c:235 Please submit a full bug report, with preprocessed source if appropriate. See URL:http://www.suse.de/feedback for instructions. error: command 'gcc' failed with exit status 1 Error installing Cython How can the problem be fixed? What further information is needed? What compiler version are you using? (gcc -v) Is it possible to upgrade? - Robert -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Singular-nc_algebra-question
I try to define some noncommutative structures in Sage, but I do not know exactly how. I found this thread: http://groups.google.com/group/sage-support/browse_thread/thread/73ea537d657a3654/ebdc76a97a0b1ea6?lnk=gstq=noncommutative#ebdc76a97a0b1ea6 and I check examples, but unfortunately I do not know how use substitute function from singular when I am in sage. So I wrote this worksheet: http://www.sagenb.org/home/pub/1474/ maybe someone could help me to explain how to do the same not in singular environment, when of course it works pretty, but in sage, as usual. Best Regards Kazek -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
Re: [sage-support] Sage in calculators
I was uin my kid's iPod Touch the other day to edit my sage notebook files at www.sagenb.org using safari no problem! HTH, A. Jorge Garcia http://calcpage.tripod.com Teacher Professor Applied Mathematics, Physics Computer Science Baldwin Senior High School Nassau Community College -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
Re: [sage-support] Re: sage blog
OK, thanx for trying. Regards, A. Jorge Garcia http://calcpage.tripod.com Teacher Professor Applied Mathematics, Physics Computer Science Baldwin Senior High School Nassau Community College -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: [sage-edu] dSage, where for art thou, dSage?
Hi, On Tue, Feb 2, 2010 at 9:00 AM, calcp...@aol.com wrote: Oh, OK, so to use dSage I need to install an spkg locally. Yes, if there's an spkg for dsage. However, note that dsage is not in any of the spkg repositories. It's not in the standard repository [1], nor the optional repository [2], nor the experimental repository [3]. If there's a demand for dsage, someone needs to step up and volunteer to maintain a dsage spkg. [1] http://www.sagemath.org/packages/standard [2] http://www.sagemath.org/packages/optional [3] http://www.sagemath.org/packages/experimental -- Regards Minh Van Nguyen -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
Re: [sage-support] Re: sage blog
OOPs, I'm sorry, I am a total noob wrt rss. How do I enable this? HTH, A. Jorge Garcia http://calcpage.tripod.com Teacher Professor Applied Mathematics, Physics Computer Science Baldwin Senior High School Nassau Community College -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: [sage-edu] dSage, where for art thou, dSage?
Hi, On Tue, Feb 2, 2010 at 9:04 AM, calcp...@aol.com wrote: SNIP BTW, how does the @parallel decorator work? Is this part of pp? See the file SAGE_ROOT/devel/sage-main/sage/parallel/decorate.py especially the function parallel() in that module. -- Regards Minh Van Nguyen -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: exponential and simplify
On Feb 1, 4:47 pm, Simon simonjty...@gmail.com wrote:
Hi, this is hopefully an easy question:
As a simple exercise, I'm trying to show that \int_0^{2\pi} e^{i (m-n)
x}dx = 2\pi\delta_{mn} for integer m, n.
Here's how I did it:
sage: var('m,n'); w = SR.wild(0);
sage: assume(n, 'integer');assume(m, 'integer')
sage: int = integrate(e^(i*(m-n)*x),x,0,2*pi)
sage: print int.limit(m=n)
sage: print int.subs({e^(w):cosh(w)+sinh(w)}).simplify_trig()
2*pi
0
The bit I don't like is using the substitution... it should not be
nesc. The problem, I think, lies at
sage: sin(2*pi*n).simplify_trig() # this works
sage: e^(i*2*pi*m).simplify_full() # this doesn't work
0
e^(2*I*pi*m)
In Maxima you would use rectform to convert the expression from polar
to rect form:
sage: int._maxima_().rectform()
0
sage: e^(i*2*pi*m)._maxima_().rectform()
e^(2*I*pi*m)
sage: exp(i*2*pi*m)._maxima_().rectform()
1
HTH, Andrej
--
To post to this group, send email to sage-support@googlegroups.com
To unsubscribe from this group, send email to
sage-support+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/sage-support
URL: http://www.sagemath.org
Re: [sage-support] Re: Sage in calculators
Harald Schilly wrote: On Feb 1, 4:59 am, Cal Armstrongsig...@gmail.com wrote: I would rather see it ported to a device that students already have, their smartphones, instead of saddling them with the purchase of another device. I just want to add that it is already possible to run sympy (pure python) inside android's python scripting environment. Hence, you can already do some symbolics in ipython, which is quite nice ;) How do you do that? Can't find python on my android :( Jaap H -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: [sage-edu] dSage, where for art thou, dSage?
Hi, On Tue, Feb 2, 2010 at 11:01 AM, calcp...@aol.com wrote: OK, let me get this straight - if I download SAGE binaries (or source files to compile) to install locally on my linux boxes on my LAN, I can use parallel python to run a cluster? I'm not sure about that. See the website of Parallel Python [1] for what it has to offer. There are many other Python packages that might do what you want. See the Python website [2] for more information. In other words, is pp included when installing SAGE locally? Third-party Python packages can be installed under the following directory of your Sage installation: SAGE_ROOT/local/lib/python/site-packages/ A Python package usually comes with a file called setup.py, located at its top-level directory. To install, say, pp under the above directory of your Sage installation, cd to the top-level directory of pp and issue the command /path/to/sage-x.y.z/sage -python setup.py install This would install pp under SAGE_ROOT/local/lib/python/site-packages/. Once pp is installed you can use it from the Sage command line interface by importing pp as a module. For more information on using pp, please refer to its website. [1] http://www.parallelpython.com [2] http://wiki.python.org/moin/ParallelProcessing -- Regards Minh Van Nguyen -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: Sage in calculators
On Feb 1, 11:57 pm, Jaap Spies j.sp...@hccnet.nl wrote: How do you do that? Can't find python on my android :( I don't have android, but i think 1. http://code.google.com/p/android-scripting/ 2. http://ondrejcertik.blogspot.com/2009/08/sympy-on-google-phone.html if it works - blog it ;) H -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: exponential and simplify
In Maxima you would use rectform to convert the expression from polar to rect form: sage: int._maxima_().rectform() 0 sage: e^(i*2*pi*m)._maxima_().rectform() e^(2*I*pi*m) sage: exp(i*2*pi*m)._maxima_().rectform() 1 Thanks, Andrej, that is very helpful. Am I correct in assuming that all e^foo with %i in foo are considered to be polar and would not simplify otherwise? Is there a way to tell whether a given (a priori unknown) Maxima expression is in a form such that rectform would be useful (that is, does rectform only apply to things in the form e^foo or (r,theta), if there is such an alternate polar form)? - kcrisman -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: installation problems for Sage binary on Mac
I am seeing the same problem I have a 32-bit core duo CPU. a i386 32-bit kernel and I downloaded sage-4.3.1-OSX-10.6-i386-Darwin.dmg but whenever I run sage I get the infamous bad cpu type error On Jan 27, 8:22 pm, Andri Egilsson andri.egils...@gmail.com wrote: Update: No, the 10.5 version does not appear to work (Bad CPU type error). On Jan 28, 12:48 am, Andri Egilsson andri.egils...@gmail.com wrote: Why don't you use the 10.5 version? Well, I assumed that the 10.5 version was only for 64 bit systems (the filename is sage-4.3.1-OSX-10.5-i386-64bit-i386-Darwin.dmg) but now that you mention it, it can be construed as being for i386 _and_ 64bit- i386, so I'll try that. Best, Andri To avoid this confusion (and perhaps save a little wasted bandwidth), shouldn't the file be called sage-4.3.1-OSX-10.6-i386-64bit- Darwin.dmg? That's a good idea... -- William Regards, Andri On Jan 26, 7:54 pm, gsw georgswe...@googlemail.com wrote: On 24 Jan., 15:38, davidgal...@gmail.com davidgal...@gmail.com wrote: I downloaded sage-4.3.1-OSX-10.6-i386-Darwin.dmg copied the contents to my disk and tried to execute sage. I received the messages -- | Sage Version 4.3.1, Release Date: 2010-01-20 | | Type notebook() for the GUI, and license() for information. | -- env: python: Bad CPU type in executable logout MacMini 1.66GHz Core 2 MacOSX10.6.2 Hi, it seems that there are two different people reporting two different problems here. - OnMacOSX10.5.8, the respective 10.5 dmg of Sage should be used (do not expect the 10.6 one to work, sorry). - On aMacMini with 1.66GHz, I presume you haven't got a Core 2 CPU, but instead a 1.66 GHz Intel Core Duo (T2300) CPU. Sorry, we don't have access to an old Core Duo machine (as opposed to the newer Core 2 Duo machines, which are not only faster, but have an enhanced command set). So in the latter case, I fear you'll have to download a Sage source distribution and build Sage yourself (type make, wait a few hours, but that's it). Cheers, Georg -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group athttp://groups.google.com/group/sage-support URL:http://www.sagemath.org -- William Stein Associate Professor of Mathematics University of Washingtonhttp://wstein.org -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: Profiling code in Sage
Ah! Running cp.run('Problem3A()') did the job. Nevermind!
On Feb 1, 9:07 pm, Stefan stefan.louis.no...@gmail.com wrote:
Hi guys,
After searching through the newsgroup for any posts on profiling code
in Sage, I thought I'd make a post asking about what possible methods
are available.
(I did come across a post that utilized 'prun', but I couldn't figure
out how to get it to work.)
Anyway, after running the code:
import cProfile as cp
cp.run('Problem3A')
Where Problem3A is a function that was previously defined, the result
is:
2 function calls in 0.000 CPU seconds
Ordered by: standard name
ncalls tottime percall cumtime percall filename:lineno
(function)
1 0.000 0.000 0.000 0.000
string:1(module)
1 0.000 0.000 0.000 0.000 {method 'disable' of
'_lsprof.Profiler' objects}
(This was done on the Sagenb.org site)
Can anyone point me in the right direction for profiling a Python
function in Sage?
--
To post to this group, send email to sage-support@googlegroups.com
To unsubscribe from this group, send email to
sage-support+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/sage-support
URL: http://www.sagemath.org
Re: [sage-support] Profiling code in Sage
Hi Stefan,
On Tue, Feb 2, 2010 at 1:07 PM, Stefan stefan.louis.no...@gmail.com wrote:
SNIP
Can anyone point me in the right direction for profiling a Python
function in Sage?
Here's an example on using prun from within Sage:
sage: %prun next_prime(10)
4 function calls in 0.000 CPU seconds
Ordered by: internal time
ncalls tottime percall cumtime percall filename:lineno(function)
10.0000.0000.0000.000 {method 'next_prime' of
'sage.rings.integer.Integer' objects}
10.0000.0000.0000.000 arith.py:772(next_prime)
10.0000.0000.0000.000 string:1(module)
10.0000.0000.0000.000 {method 'disable' of
'_lsprof.Profiler' objects}
For more information on the command prun(), see its doctring by
issuing the command prun?.
--
Regards
Minh Van Nguyen
--
To post to this group, send email to sage-support@googlegroups.com
To unsubscribe from this group, send email to
sage-support+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/sage-support
URL: http://www.sagemath.org
[sage-support] Re: Listing all k-minors of a matrix?
On 02/01/2010 08:12 AM, javier wrote: You can see the source of the minors method using sage: M.minors?? (you need to have defined M beforehand). By browsing at that source one can easily find the general way of doing it: sage: A = Matrix(QQ, 3, [1,2,3,4,5,6,7,8,9]) sage: [A.matrix_from_rows_and_columns(rows, cols) for cols in combinations_iterator(range(A.ncols()), 2) for rows in combinations_iterator(range(A.nrows()),2)] [ [1 2] [1 2] [4 5] [1 3] [1 3] [4 6] [2 3] [2 3] [5 6] [4 5], [7 8], [7 8], [4 6], [7 9], [7 9], [5 6], [8 9], [8 9] ] Or slightly easier to read: sage: A = Matrix(QQ, 3, [1,2,3,4,5,6,7,8,9]) sage: [A[rows,cols] for cols in Combinations(A.ncols(),2) for rows in Combinations(A.nrows(),2)] [ [1 2] [1 2] [4 5] [1 3] [1 3] [4 6] [2 3] [2 3] [5 6] [4 5], [7 8], [7 8], [4 6], [7 9], [7 9], [5 6], [8 9], [8 9] ] Thanks, Jason -- Jason Grout -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: exponential and simplify
Thank you both for your replies.
It's interesting that in Andrej's examples, the e^x and exp(x) form do
not yield the same result,
since in maxima (which I know next to nothing about) we have
(%i1) declare(m, integer);
(%o1)done
(%i2) rectform(exp(2*m*%i*%pi));
(%o2) 1
(%i3) rectform(%e^(2*m*%i*%pi));
(%o3) 1
Is this a problem with the sage conversion?
Note these two different behaviours:
sage: var('m'); assume(m, 'integer')
m
sage: e^(i*2*pi*m)._maxima_().rectform()
e^(2*I*pi*m)
sage: exp(i*2*pi*m)._maxima_().rectform()
1
but (this was tested in a new sage/maxima session)
sage: var('m'); maxima('declare(m, integer)')
m
done
sage: maxima(e^(i*2*pi*m)).rectform()
1
sage: maxima(exp(i*2*pi*m)).rectform()
1
--
To post to this group, send email to sage-support@googlegroups.com
To unsubscribe from this group, send email to
sage-support+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/sage-support
URL: http://www.sagemath.org
