Hi,
The following scares me.
sage: 0^0
1
sage: F.=GF(5)
sage: F(0)^0
Traceback (most recent call last):
...
ArithmeticError: 0^0 is undefined.
For any x, x^0 is 1 by definition. Isn't it in Sage? I am using Sage
4.1.2
Kwankyu
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Hi,
sage: A=matrix(2,[1,2,3,3])
sage: A.solve_right(vector([3,6]))
(1, 1)
sage: category(_)
Category of elements of Vector space of dimension 2 over Rational
Field
sage: A.solve_left(vector([3,6]))
[3 0]
sage: category(_)
Category of elements of Full MatrixSpace of 1 by 2 dense matrices over
Rati
On Oct 23, 12:11 am, John H Palmieri wrote:
> On Oct 22, 1:25 am, Kwankyu Lee wrote:
>
> > Hi,
>
> > The following scares me.
>
> > sage: 0^0
> > 1
> > sage: F.=GF(5)
> > sage: F(0)^0
> > Traceback (most recent call last):
> > ...
&g
I hope some expert confirm that this is a bug or merely my
misunderstanding.
Kwankyu
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Hi,
To get the names of generators of a polynomial ring R, I may use
R.variable_names().
But it seems that the method at least does not fail for other rings.
For example,
sage: GF(2).variable_names()
('x',)
What is the intention? If variable_names() intends to return the names
of generators, th
I think "generator_names()" is a universal name for all structures,
and "variable_names" should be an alias of that only for polynomial
rings.
I understand William's concerns, but I think there should an official
mechanism to change an inappropriate nomination with what makes sense
as soon as it
Hi,
verbose() may be quite useful for user programs, but it seems right
now only oriented for developers. If I place some verbose("...",
level=1) statements in my Sage program, and the verbose level is set
to 1 by set_verbose(1), then the verbose statements of internal Sage
functions are printed,
Oh... I missed the parameter "files" of set_verbose(). The parameter
already fulfills my wish as in
set_verbose(1,files="myprogram.py")
Sorry for noise...
Kwankyu
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Hi,
I am experiencing the problem exactly that David raised
Then it seems the original idea is good that we add "tag" (or "flag"?,
I don't like "component" as Robert proposed) parameter to verbose
commands. It will default to "internal" (or "system" or "library" or
"builtin"?) This will not brea
Hi,
Is this an expected behavior of the magma interface?
--
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| Type notebook() for the GUI, and license() for information.|
--
Hi,
What is the standard way to get a reference to a magma object in Sage?
Is it "m._ref()" or "m.name()"? What is their difference?
Kwankyu
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On Nov 15, 3:56 am, William Stein wrote:
> On Thu, Nov 12, 2009 at 11:43 PM, Kwankyu Lee wrote:
>
> > Hi,
>
> > Is this an expected behavior of the magma interface?
>
> > --
> > | Sage V
As East Asian countries, please include Korea along side with China
and Japan.
Thank you!
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Hi Harald,
On Nov 19, 12:59 am, Harald Schilly wrote:
> They are meant to be included by the dots. It's just for a rough
> estimate where you are, nothing specific.
I know. :-)
This survey is nice. Thank you for your work.
Kwankyu
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Thank you. The article reveals human sides of the origin of the
inhumanly marvelous Sage project and its originator. Quite moving.
Kwankyu
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Hi,
I want to raise this issue again.
sage: P. = PolynomialRing(QQ,2)
sage: f = 2*x*y+x+y
sage: f.coefficient({x:1,y:1})
2
sage: c = f.coefficient({x:1,y:1})
sage: c.parent()
Multivariate Polynomial Ring in x, y over Rational Field
sage: c = f.monomial_coefficient(x*y)
sage: c.parent()
Rational
Hi,
There is no problem on the command line:
sage: r"\use"
'\\use'
But in the notebook of Sage 4.3.3, the same input produces
Traceback (most recent call last):
File "", line 1, in
File "_sage_input_37.py", line 9, in
open("___code___.py","w").write("# -*- coding: utf-8 -*-\n" +
_supp
Hi,
In Mac OS, latest Magma v2.16-6 fails to load under Sage 4.3.3, with
the following error message:
sage: magma_console()
dyld: Library not loaded: @executable_path/libgmp.3.dylib
Referenced from: /Applications/Magma/bin/magma.exe
Reason: Incompatible library version: magma.exe requires ver
Hi William,
That works. Thank you. If you don't, I will open a ticket for this.
Kwankyu
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This is now Ticket #8560
http://trac.sagemath.org/sage_trac/ticket/8560
Kwankyu
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Hi,
No objection. But you need to provide deprecation warnings before
removing any long used things in Sage.
Kwankyu
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imension 7 over Rational Field
sage:
How possibly could this happen? Why I get a different result in
doctesting? I seek of your expertise. Thank you in advance.
Kwankyu Lee
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Hi Leif,
This doctest failure did not occur without applying my own patch, so I
thought my patch was the cause. A weird bug indeed...
Thank you for the pointers.
Kwankyu
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sa
Added information to the ticket http://trac.sagemath.org/sage_trac/ticket/9003
Kwankyu Lee
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Hi
While I am working on a small patch to a file in sage/gsl/ for the
ticket
http://trac.sagemath.org/sage_trac/ticket/9080
I am wondering why the gsl directory occupy the top-level place in the
Sage library. I suppose that the top-level directories represent big
themes, but gsl is just a partic
A related comment:
I like the method name "variables" for symbolic expressions. On the
other hand, I think the name "variable" should be avoided in the exact
polynomial rings cases, as in
sage: P.=PolynomialRing(QQ)
sage: P.variable_names()
('x', 'y')
In this case, "gen_names()" is perhaps appro
Hi,
I might be a beginner of the toric geometry package in Sage.
I prefer long and explicit names for method names. However, I also
prefer to see those methods have docstrings that are written using the
traditional N and M notations.
I also want to mention that N reminds me of the Mathematica N(
How about
sage: tutorial() # optional
with no return value? It would be better if the tag optional can be
removed as the doctest mechanism prevent a web browser from opening.
Your cheating is a bad idea.
Kwankyu
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Hi,
On Sage 4.4.4, I have the following bug.
sage: F.=GF(4)
sage: m=matrix(2,[F(1),2,3,4])
sage: magma(m)
---
TypeError Traceback (most recent call
last)
...
TypeError: unable to coerce element
> This is now trac #9377.
Thank you.
> sage-support is a better place to report bugs.
> sage-devel is for discussions about development.
>
> Mariah
I see.
Kwankyu
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sage-deve
Hi,
Currently there is an option "repr" for the finite field constructor.
For small finite fields, it can take "log", which makes finite field
elements printed as a discrete log with base the primitive generator.
So a^14 is printed as 14
It would be very convenient if "repr" can take "power" such
On Jul 8, 12:20 pm, John H Palmieri wrote:
>
> I'm not sure which finite field constructor you're looking at. In
> rings/finite_rings/finite_field_givaro.py, the "repr" option is
> described this way:
>
> repr -- controls the way elements are printed to the
> user:
>
Hi,
There is a simple script for that purpose in trac ticket #7893.
http://trac.sagemath.org/sage_trac/ticket/7893
Kwankyu
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Hi Don,
I just uploaded a revised version of the script modified according to
your comments. Check it out!
Kwankyu
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Hi Minh,
Thank you for the link to the article of J. Neubuser. I think the
article should be displayed in a holy place at the Sage website, as it
seems to me the original source of the philosophy on which all this
Sage project is founded.
Kwankyu
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Hi,
A developer of R attempted to pull the part of the Bash source code
responsible for the "operate-and-get-next" feature into R interface.
See the following link:
http://r.789695.n4.nabble.com/readline-operate-and-get-next-td2317208.html
I want to do the same thing for Sage. As I am ignorant o
Hi Dan,
Thank you for the comments.
IPython just relies on the readline library linked to Python. Perhaps
Sage can provide necessary functions that complements the readline
library.
I did some experiments, and I now think this is a doable task. So I
made a ticket:
http://trac.sagemath.org/sage_
Hi,
I uploaded a patch to this ticket.
Please do experiments with it, and leave comments.
Kwankyu
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Here is the ticket
http://trac.sagemath.org/sage_trac/ticket/10289
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Hi,
Perhaps it is well known to others except me (until a moment ago) that
the following code
print vector([1,0,1])
is loaded and executed if it is contained in a file named like
"test.sage", but results in error if the file name is changed to
"test.spyx". The Sage Tutorial says as if there is n
There is a related ticket:
http://trac.sagemath.org/sage_trac/ticket/482
Kwankyu
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Hi Robert,
I just learned at a corner of the Tutorial that preparsing is not
applied to .spyx files. So my assumption that .sage and .spyx are
equivalent except compiling is not true.
Then what is difference between .spyx and .pyx...I am saying to
myself. ^^
>
> It's because Pyrex/Cython didn't
Hi,
I love the reference manual in the new format. For building time
problem, users may be given several choices, one of which might be
just to download the built documentation from the web.
Kwankyu
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Hi,
I like the new approach. In the same vein, the Contents page may be
restructured such that it lists only chapter titles, and each chaper
has its own contents page. The current Contents page is too long to
scroll down to reach what I want.
Kwankyu
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Hi,
.sage and .spyx files are intended for end users while the library
files should be .py or .pyx files.
Kwankyu
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Hi,
As an occasional developer for Sage, I have a question regarding to
what should be the target release of Sage for a patch. This question
arose to me at least twice.
I wrote and uploaded a patch for the latest release, 4.6, of Sage.
Then a reviewer said the patch is not applied cleanly to the
I found sage-release. Never mind the second question.
Kwankyu
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Hi Minh,
+1. Thank you for the good move.
Kwankyu
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URL
Hi,
How about "Sage Math User Group" - SMUG?
Kwankyu
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U
Hi,
I would like to see a section on "rebasing patches" with mercurial
queues, in the Developer's Manual. It is a frequent task to rebase a
patch for a new version of Sage. I myself do this one way, but I am
not sure if I am doing it the right way. My way is simply:
1. hg qpop -a
2. upgrade Sage.
Hi all,
This is to advertise a patch (http://trac.sagemath.org/sage_trac/
ticket/10289) which, unfortunately, is sleeping in Trac without a
reviewer for more than four months.
This patch would be very useful for those who converted from Magma.
Please review!
Hi,
How about converting triple dots (...) in math(I mean inside ` `) in a
docstring automatically to \dots so that it appears nice both in commandline
and in notebook? Does this have a trac ticket?
Kwankyu
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Other solution would be to convert \ldots in latex markup to ... in
commandline. Currently, \dots inside ` ` is just converted to "dots". This
looks ugly in commandline.
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Hi,
I hear about patchbot here and there. I understand it as an automatic patch
testing system. Is that available to an occasional developer like me? Or is
that for the release manager and his/her lieutenants? Please give me a short
guide on it or a reference to it. Thank you.
Kwankyu
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Hi Johin,
You may be interested in the ticket:
http://trac.sagemath.org/sage_trac/ticket/10289
Would you kindly review it? It's long been in "needs review" state.
Kwankyu
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So \ldots is converted to "...", but \dots is not. Ok.
Thanks, John!
Kwankyu
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I just looked into the detex function. To me, it seems a little buggy.
1. "\ldots", "\cdots" are both converted to "...". Hence there is no reason
not to convert "\dots" to "..."
2. The programming logic introduces a bug. For example "souldots" is
converted to "sou...". That is, if there is a w
Thanks, Dan!
Kwankyu
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URL: http://www.sagemath.org
Here is the ticket:
http://trac.sagemath.org/sage_trac/ticket/11265
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This is also basic, but inconsistent throughout the documentation.
The first one line of every method docstring should be written as a command.
Hence
"""
Return true if blah blah
rather than
"""
Returns true if blah blah
Kwankyu
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Hi,
I would like to see Puiseux series in Sage, implemented as an exact ring (in
particular over the algebraic closure QQbar).
I recommend you to examine the Puiseux series implementation in Magma as a
benchmark.
Kwankyu
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Hi,
I am going to deprecate a property attribute defined in a certain class with
the reason being that in Sage, using a method to obtain a property of
objects is preferred than using property attributes. I think an example is
that we use parent.ngens() rather than parent.ngens.
My question is
Hi Jason,
I totally agree with you. Thanks for the definitive comments.
Kwankyu
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Hi Martin,
Thank you for asking this to sage-dev.
I want to be more informed about this pickled Sage objects stored in the
pickle jar. First let me explain what I understand. The pickle jar is there
to ensure that upgrading Sage does not break unpickling of Sage objects
pickled in a previous v
Hi Simon,
It seems to me that
Your remarks: If the internal data structure has changed, then it is
imperative that data stored in the old format will be correctly translated
into the new format when unpickling. ... "upgrading the old objects pickled
by users" must be part of the usual unpickl
Hi,
I am confused with the usage of "Homset" and "Homspace". It seems to me that
each author choose his/her favorite among "Homset" and "Homspace". But is
there a reason to prefer one over the other for new modules? Or do they have
distinct usage? I am asking this because at some point William
Hi Robert,
I guess some use homspace for the homset for an abelian category. I agree
that for consistency, it is good to use homset everywhere in Sage.
Kwankyu
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Hi,
How does Sage solve the following situation? A user stores objects pickled
in Sage version X.1. Then a developer changes internal logic and data
structure of the class of the objects for Sage version X.2. If we assume the
developer's patch is merged to Sage X.2, then typically the user's ob
Hi Simon,
I thought of the proposal while fixing unpickling problem of the patch for
TermOrder objects for
http://trac.sagemath.org/sage_trac/ticket/11316
The situation I described originally is of course what I faced while fixing
the problem.
On 27 Mai, 18:10, Kwankyu Lee wrote:
> &g
Hi Simon,
I am one of those who eagerly hope the thematic tutorial to be written and
maintained by the core developers of Sage. The article should explain on
parents, elements, categories, coercion, morphisms, homsets, and the
canonical way to program an algebraic structure on the basic concept
Hi,
In Sage Notebook, entering shift-enter after typing
E=EllipticCurve?
shows correctly the doc, but on commandline, we get
sage: E=EllipticCurve?
Object `E=EllipticCurve` not found.
This different behavior seems a bug. I am using Sage 4.7.
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I now see that this is IPython' fault.
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Hi, Simon
All right. Now I think the ? behaves reasonably in each of both
environments, though it's not perfectly consistent. In the notebook, it is
good to get some information on an object in the midst of typing a
statement.
Cheers
Kwankyu
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It would be nice if
(1) Sage library consists of core + optional parts
(2) An optional part is dependent on core + other optional parts
(3) Optional parts to install can be selected at build time.
(4) An optional part has its own documentation, but accessible through a
single interface in Sage.
Then "OPTIONAL - foo" gets the same status with "EXAMPLES" (or "INPUT",
"OUTPUT", etc). This conveys a misconception since "OPTIONAL" does not mean
anything with the method or function that this docstring is attached to.
I prefer Dima's suggestion or some variant of that.
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On Friday, April 15, 2016 at 6:54:44 AM UTC+9, kcrisman wrote:
>
>
> > These packages are nearly impossible to found from the sagemath website!
>>
>> Chris -- who wrote abelfunctions -- is a Univ of Wash grad student I
>> know. I recently ran into him and he told me that he had spent years
>>
On Friday, April 15, 2016 at 8:46:44 AM UTC+9, Chris Swierczewski wrote:
>
> I felt like writing this up:
>
> https://gist.github.com/cswiercz/c632d920565a2da519b73bd2b79d7920
>
> Please suggest improvements and corrections.
>
Sorry. I didn't see your post before I wrote mine :-) That is a nice s
I would appreciate if anyone is interested enough to review:
http://trac.sagemath.org/ticket/19084
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Not anyone, but experts on Sage's Singular interface.
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I want to write a Sage module, say "function_field.py", that uses Singular
functions defined in a library, say "singular_core.lib". My questions are
(1) Where should I put the library file? I guess it should be along with
the Sage module file.
(2) If so, then how should I load the library? I kn
+1
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Visit
I guess I could never figure out this by myself. Thank you!
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The webpage from the Madrid server opens but contains no Sage cell. My web
browser is Chrome on Mac. Accessing from Asia might be a cause.
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Which one is correct?
(1) "This is based on code by A and B"
(2) "This is based on codes by A and B"
(3) "This is based on the codes by A and B"
I am just curious. I am not a native English speaker.
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I didn't know this. Thank you!
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This discussion is hardening the terms: Sage core and external packages.
But from the point of view of the people developing the would-be external
packages, the official term would better be
Sage extension,
Sage library extension,
Sage library extension package,
or SLEP.
Or simply extension pa
As the author of #20182, I don't think that the behavior of `sage -t`
changed. #20182 triggers a new behavior only if you put
"optional=...,external,..." in the argument list. On the other hand, new
definitions of
make (p)testoptional(long)
make (p)testall(long)
indeed include "optional=sage,o
Thank you for starting and sharing this.
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Dear Sage developers,
As Sage 7.2 just released, we can now use its new feature to test optional
doctests that depend on external software and resources *available on your
system* by issuing
make ptestalllong
instead of "make ptestlong", which has long been used to test a Sage
release, discre
Equivalent line that works for file xxx is
sage -tp --optional=sage,optional,external --long xxx
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I am wondering why no one mentions the "six" package to maintain a
temporary py2/py3-compatible codebase. I have an experience of moving my
own small project from python 2 to python 3 with the "six" package quite
successfully. The strategy was to add "import six" at every file and make
the file
>
> Suppose that our object X has a basis consisting of four 2x2 matrices,
> in some abstract sense. Then your
>
>X.list()
>
> might very well return a tuple of four *mutable* 2x2 matrices. Then
> this X.tuple() is still very much mutable, and the original problem
> has not been solved
As the discussion of this thread seems to converge to the conclusion that
we need to transfer the function of X.list() to X.elements() or like to
avoid confusion, I still like to add to the following separate issue
>> (For matrix X), X.list() returns a list of all the
> >> entries of the matri
> sage: x=-.9
>
> sage: y=.1
>
> sage: gamma(x)*gamma(y)/gamma(x+y)
>
> 17.5241239902668
>
> sage: beta(x,y)
>
> NaN
>
I get the same on Sage 7.3 beta3 on Mac.
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It is _latex_(self) according to the developer manual
http://doc.sagemath.org/html/en/developer/coding_in_python.html#latex-representation
On Wednesday, June 15, 2016 at 8:18:51 AM UTC+9, Paul Masson wrote:
>
> I'd like to add LaTeX support to special functions that do not yet have
> it. Before
I found a strange bug that has existed at least from Sage 7.1
In a fresh start of Sage,
sage: GF(2)^2
Vector space of dimension 2 over Finite Field of size 2
sage: CyclicPermutationGroup(10).algebra(FiniteField(5))
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T
It is also strange why the pasted text copied from terminal looks double
spaced...
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Perhaps you had the same issue with mine. Then the correct fix was just to
remove the line for trac.sagemath.org in the file .ssh/known_hosts, not
resetting your own ssh keys. Now that you seem to have changed your ssh
private/public key pair, you need to register your new ssh public key to
tra
I ran ssh -v k...@trac.sagemath.org. It also fails :-) But I have no
problem in pushing changes to trac...
On Wednesday, June 29, 2016 at 11:49:31 AM UTC+9, tara fife wrote:
>
> Thanks,
>
> I went into the known_host file, and deleted everything, since I should
> only have things for Sage. Then
How about "m.multiplicative_inverse()" or just "m.inverse()" which already
works for matrices? Or those with a hyphen prepended, for "internal" use.
On the other hand, "inverse" or "invert" implies that m is(should be) a
unit. Then "unit" in the name seems redundant...
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