are better ways to do this
than through Cython i'd luv to hear your suggestions.
Thanks,
Vincent
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ript to the source tree.
(Which I am assuming is more or less what .spkg maintainers are already
doing anyway ...)
/v
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To post to
o be compiled separately (or which gets
compiled in the background). That's not at all real-time, so I'm not
sure it fits the original purpose, but it certainly can produce a movie
(in .avi or whatever format) in the end.
/v
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4
lines of the same
image and merge them in the end, if you really want to squeeze the last
second of computation out of your Core-16-bis-quarto ...)
OTOH, I read about almost-real-time raytracing by having the
computations done by the GPU ... But if that is the direction you want
to look into,
> Thanks Vincent for the information. One reason I am choosing not to
> use povray is the license, which I believe is not compatible with
> inclusion in Sage.
Ah. I didn't know about the license, I had a look and indeed it is not
quite free enough. BTW I am not pushing povray a
One last thing: Apple's implementation of h264 is not quite as complete
as the one of x264 (which I find quite ironic), so if you are not
careful the file you produce will not be readable on a mac ...
I am attaching a Makefile that I used to encode video, in case you find
it useful. Be sure to
Hi,
It seems that SAGE does not yet have an implementation for modeling
stochastic matrices and Markov processes. Am I right ? Is there a
possible SAGE extension which can do that ? Does anybody planned to
work on it ?
Cheers,
Vincent
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To
Hi,
I just propose a SAGE notice on the french platform of the promotion
of free software Framasoft (http://www.framasoft.net/). Do not
hesitate do modify or complete it:
http://wiki.framasoft.info/PropositionNotice/SAGE
Cheers,
Vincent
y an
expert on the particular platform (os/compiler/compiler-version).
Then again I'm thinking in general terms and maybe in the case of sage
people don't build it or change flags so often and you can ignore this)
--Vincent
--~--~-~--~~~---~--~~
To po
On Oct 7, 2009, at 7:54 AM, Vincent Labrecque wrote:
>
> And as I'm writing this, with regards to optimization flags, maybe
> the sage build system should provide an abstraction over -On. As
> I'm sure you know, these have widely differing behaviors across
> compi
Hello,
I'm just in trouble with the behavior of sqrt(n) when n is an integer,
because of the following:
{{{
sage: x = sqrt(2)
sage: x in RR
True
sage: x > 1 # a boolean expected
x > 1 # a symbolic expression obtained
}}}
It could be avoided by forcing the interpretation of the boolean
expr
Hi,
I agree that sqrt(2) > 1 ;) the problem is the one Jason has
developed : the comparison returns a symbolic expression !
Morever, It works well for min and max functions :
{{{
sage: max(sqrt(2), 1)
sqrt(2)
sage: min(sqrt(2), 1)
1
}}}
Why max(sqrt(2), 1) not a symbolic expression ?
Vinc
finance module) ? What is
the interaction between the registered name by the company and the
GPL ?
Vincent
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://iml.univ-mrs.fr/~delecroi/lycee-vd.patch
I've got now a problem with the plot function. A call to plot pops a
png and does not show it in the worksheet ! What is missing in my
import statement ?
Vincent
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of printing in the worksheet page. As it
concerns the code and not the usage of Sage I wrote here and not in
sage-support... perhaps a mistake ?
Vincent
On 2 nov, 07:08, Rob Beezer wrote:
> Vincent,
>
> I like your idea, and wonder if you might not post to sage-edu where I
> know so
It seems that a:
{{{
from sage.server.all import *
}}}
resolves the plotting problem.
I updated the patch (still the same adress
http://iml.univ-mrs.fr/~delecroi/lycee-vd.patch)
Now, an other problem arises. Maxima starts to polluate the RAM
(arround 20% of my 1G) and goes in a loop during appr
I understand now (and agree on) the design: sqrt(2) is symbolic and
any sage expression containing a symbolic expression is also symbolic.
But, considering the non comparison, it seems to give a set theoritic
contradiction:
sage: sqrt(2) in RR
True
And RR is an ordered field.
I think it goes in
rc'
Unable to build Singular.
[...]
sage: An error occurred while installing singular-3-1-0-4-20090818.p1
[...]
Vincent
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Hi sage-developers,
I need objects in Sage that not yet totally exist (a combinatoric one,
and another derived from oriented graph). So I write some python files
(pure python for the moment) to create those new objects. My problem
is that I didn't find any place on the web where it's said how to
On 13 jan, 18:46, "David Joyner" wrote:
> On Tue, Jan 13, 2009 at 12:38 PM, Vincent Delecroix
>
> <20100.delecr...@gmail.com> wrote:
>
> > Hi sage-developers,
>
> > I need objects in Sage that not yet totally exist (a combinatoric one,
> > and
On 13 jan, 20:27, Jason Grout wrote:
> Simon King wrote:
> > Dear Vincent,
>
> > On Jan 13, 6:38 pm, Vincent Delecroix <20100.delecr...@gmail.com>
> > wrote:
> >> I need objects in Sage that not yet totally exist (a combinatoric one,
> >> and
missing doctests and documentation, layout of the files, etc, but all
> that can be straightened out.
>
> Cheers,
>
> Michael
I fixed all problems with the installation of my library. Thank you
everybody.
I will post a message on sage-combina
Hi,
I'm interfacing a C++ class with cython. Because my C++ class inherit
from a std::basic_string class I inherit some tests method like :
bool My_class :: test_function()
It seems that Cython do not know the C++ bool type and, consequently,
there is no direct conversion between C++ boolean
.]
libm4ri testsuite failed, please report upstream!
sage: An error occurred while installing libm4ri-20090128
Cheers,
Vincent
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with mprotect/signals
/bin/sh: line 1: 2909 Segmentation fault LD_LIBRARY_PATH=../../
gcc $dir/$tst
FAIL: gctest
===
1 of 1 tests failed
===
Perhaps the best solution is to migrate to another distribution :).
Cheers,
Vincent
On 22 fév, 15:07, mabshoff wrote:
>
> Hmm, something strange is going on here. I am surprised boehmgc runs
> make check, but it isn't a good sign.
I launch myself the make check. That's not a part of the compilation
(If it's what your questioning about).
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Hi,
Even with gcc-3.4.6 the compilation fails exactly at the same point
(with exactly the same errors). I will ask help tomorrow from the
network engineer.
I will post if I find a solution still using Mandriva 10.2.
Cheers,
Vincent
>
> Hi Vincent,
>
> > > Hmm, something s
case ?
Thanks,
Vincent
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will collect the comments and write few lines about that.
Thanks
Vincent
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The link of the old (2006) thread dealing about how to build the live
cd is broken
http://groups.google.com/group/sage-devel/browse_thread/thread/44a5160700e1f250/e014c7a9149b7cbc?lnk=gst&q=live+cd#e014c7a9149b7cbc
does anybody have safely saved the instructions ?
Vincent
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I choose
is the good one.
Vincent
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Perhaps it is this
http://trac.sagemath.org/sage_trac/ticket/4838
but it is not about the same problem. I will look more carefuly as
soon as possible
Vincent
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I created tiny patches for both trac 4838 and 8082. They now waits for
review.
I need more time to look at matplotlib and polar coordinates. Thanks
for pointing the different interrelated tickets.
Vincent
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otting Rauzy fractals in SAGE for tomorrow afternoon ! If everything
goes well, there will be a ticket ready tomorrow evening (Paris time).
I won't forget the shortcut fractals.RauzyFractal
Cheers,
Vincent
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To
r sagemath-edu.org. If nobody aims
to use them, they will be lost in one year. They are available to any
project...
Vincent
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For more opti
plot,
plot3d and latex (for example: vertex/edge labels, vertex/edge
colors, ...). Do we want to have a set of common options together with
specialized one ?
Cheers,
Vincent
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sage-
e best option.).
- direct dot, ps, svg, gml outputs (plaintext format) without calling
latex which sometimes crashes because of memory overload.
- the graph_editor. There could be in Sage a java interactive editor
for both 2d and 3d graphs as jmol is used vor visualization ! This
could allow v
//groups.google.com/group/sage-devel/browse_thread/thread/c5a585cac8cb57e0
Vincent
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metry:
http://iml.univ-mrs.fr/~delecroi/hyperbolic_half_plane.py
A sage worksheet that explains how the thing works:
http://iml.univ-mrs.fr/~delecroi/polygon_in_hyperbolic_plane.sws
Thank you,
Vincent
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nk you for your answers, I'm looking carefully at what Helena
Verrill did,
Vincent
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I opened a ticket [1] for hyperbolic geometry. I implemented a general
framework for the hyperbolic half plane (with point, geodesic,
polygons) and the action of SL(2,R).
Any help or comment welcome.
Vincent
[1] http://trac.sagemath.org/sage_trac/ticket/9439
PS: I do not (want to) know any
> > I opened a ticket [1] for hyperbolic geometry. I implemented a general
> > framework for the hyperbolic half plane (with point, geodesic,
> > polygons) and the action of SL(2,R).
>
> > Any help or comment welcome.
>
> > Vincent
>
> > [1]http://trac
hen give me back the index of the group generated by
them"? And if yes is the answer, how? And if no, how you proove it?
- how can we check that a given subgroup of finite index is a
congruence group?
Thank you
Vincent
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provide support for free, for a fee, or not at all.
* The Project owner has no obligation to accept or use your
contribution.
"""
Vincent
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r not (Nielsen-Schreier algorithm
gives you the rank of the subgroup. Then if you're of finite index the
rank of the subgroup gives also the index (Nielsen formula). As there
are only a finite number of groups of given index this it is a finite
check)... Am I right?
I expect an extension of Nielsen
not
understand why this function does not call edge_iterator instead).
Should I open a ticket or did I say something wrong?
Cheers
Vincent
PS: the way .edge_boundary is coded is *dirty*: it first creates a
list from an iterator and then iterate through the list freshly built!
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OK. This is now #9581.
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flict between conjugacy of elements and conjugation of
subgroups...
Thanks,
Vincent
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Tanks for answers!
> > > I'm working on arithmetic subgroup in sage.modular.arithgroup
> > > especially on arithgroup_perm, and I do not know what does the method
> > > __cmp__ must do (it is not specified in sage.groups.group.Group where
> > > I guess it is the right place):
> > > * equality a
ic_with_category.element_class' object has no
attribute 'det'
sage: SL(2,ZZ)(1).trace()
AttributeError:
'SpecialLinearGroup_generic_with_category.element_class' object has no
attribute 'trace'
}}}
One would like to have a uniform behavior for matrices, right ?
Vince
Hello,
I got an error while compiling sage-4.7.2 on my computer (Intel core 2
Duo T8100) at the very begining. I should mention that on the same
computer sage-4.7.1 compiles. Does anybody encounter such a problem or
have a solution ?
$ uname -a
Linux jahe 2.6.32-5-amd64 #1 SMP Fri Sep 9 20:23:16
On 13 nov, 07:52, Dima Pasechnik wrote:
> indeed, it looks as if libstdc++ (-dev) packages aren't fully installed.
> Try running
> aptitude install libstdc++-dev
You were right ! My apt-get thought libstdc++-dev was there but it
wasn't. I solve the problem by downgrade gcc and force the
reinstall
generators for that
semigroup ?
Cheers,
Vincent
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mentation looks ugly. Does this need a ticket ?
Best,
Vincent
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Hello,
Does anybody get the same kind of error as below and manage to solve
it ? Otherwise, I will send a mail to the mercurial team to figure out
what's up.
Best,
Vincent
pushing to http://combinat.sagemath.org/patches/
searching for changes
** unknown exception encountered, details f
The problem may come from incompatibility between mercurial on my
laptop (hg 1.3.1 distributed with Sage) and mercurial on the server at
combinat.sagemath.org. Does anybody knows its version (or how obtain
it) ?
Cheers,
Vincent
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27;), (4, 2, 't'), (4, 5, 'c'),
...(5, 0, 't'), (5, 1, 'b'),(5, 1, 'c'), (5, 3, 'c')])
sage: G2 = G1.relabel(perm={0:4,1:5,2:3,3:2,5:0},inplace=False)
sage: G1.is_isomorphic(G2,edge_labels=True)
False
}}}
The problem appears in sage-4.7
Actually, the problem is even worst... the function relabel does not
do the right job! The graph G2 obtained as above has two loops at the
vertex 4.
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>
> How did you get simply "False"? I always get (False, False) on the last
> line, with sage-4.6, sage-4.6.2, sage-4.7 and sage-4.7.1.alpha3.
>
I also get "(False,False)" but expected "True"! I did a wrong copy-
paste operation.
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On 8 juil, 16:05, Jeroen Demeyer wrote:
> On 2011-07-08 15:15, Vincent D wrote:
>
> > Actually, the problem is even worst... the function relabel does not
> > do the right job! The graph G2 obtained as above has two loops at the
> > vertex 4.
>
> Well, to what does t
On 14 juil, 08:55, Robert Miller wrote:
> On Wed, Jul 13, 2011 at 11:47 PM, Robert Miller wrote:
> > See
>
> >http://trac.sagemath.org/sage_trac/ticket/10549
>
> ... and its dependencies.
Thanks Robert for pointing this. But is the following the expected
behavior ?
{{{
sage: G1 = DiGraph(loops=T
; object has no attribute
'is_subcategory'". It is few lines in Parent.__init__ but I suspect
that some ticket solves the problem yet. Does anybody know what should
I do?
Best,
Vincent
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modify three lines in the comparison method of Sage integers.
Any comment or review welcome!
Cheers,
Vincent
[1] http://trac.sagemath.org/sage_trac/ticket/13386
[2]
http://groups.google.com/group/sage-devel/browse_thread/thread/92f7060b17c8ee41/
[3]
http://groups.google.com/group/sage-devel
Dear facade lovers,
I just upload on trac a patch about the initialisation of facade sets
at #13801. One of the smallest patch I never write... which corrects
two errors.
Please, send comments.
Best,
Vincent
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"
2013/8/26 Jeroen Demeyer
> It's hard to define what "coercion" would even mean in this case. The
> manual mentions that it must be a ring homomorphism, but in this case (RLF,
> RR, RIF) the mathematical ring is all the same, namely "the real numbers".
> It is only the implementation of the ring w
mple: If x is a real number and I is an interval what do
we want for the result of I+x? I would prefer to obtain an interval,
but I think of this operation as a right action of RR on RIF by
translations of the intervals and **not** as an addition.
Best,
Vincent
2013/8/26 Marco Streng :
>
>
>
other similar troubles with hashing, equality and
comparisons:
- http://wiki.sagemath.org/EqualityCoercion
- #14608 on trac
Cheers,
Vincent
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option would be to pass the iteration of neighbor iteration to
some level down in the hierarchy of backends. This, together with
#14690, might be enough to get some speed up.
Best
Vincent
2013/8/30 Jernej Azarija :
> This is a follow up of the thread [1] in which we noticed that there is a
>
; a company to eventually earn money, which can be used to fund Sage
> development. That's what https://cloud.sagemath.com is about.
I think that the Magma exclusiveness proposed by the "Simons
foundation" is much more nocive than the fact they do not support an
ope
Note that Flooved is sponsored by Wolfram alpha [1] and they intend to
integrate their platform with it [2]...
[1] http://www.flooved.com/about-us
[2] "What future features are you going to implement? " in the FAQ
2013/8/31 kcrisman :
>>
>> So did they contact you directly, or did you run acro
will soonly be positively reviewed... It concerns only embedded
surfaces in R^3 but I am sure it would be better to use the code
already there.
>- better graphical outputs
>- better efficiency (migrating some parts to Cython?)
For symbolic computation it will not change anything to u
Here is an answer
{{{
sage: class A(object):
: def __getattribute__(self, name):
: return name
:
sage: a = A()
sage: a.b
'b'
sage: a.nathann
'nathann'
}}}
Actually, the tab completion looks really funny on this object!
2013/9/17, Nathann Cohen :
>> I would suggest that you
ring" does not canonically coerce
> into any other ring.
I do not agree. RR and CC are *badly* named in Sage. As Peter said,
they are sets of floating point numbers. In particular, I found
completely valid that Infinity is an element of RR (since it is *not*
the set of real numbers).
Vincen
I also failed to install it in Sage. But on the other hand it was
trivial to install it with the package manager on Debian/Ubuntu (and
any Unix I guess)... does anyone know how far the GSoC project of
having the builtin Python instead of the one shipped with Sage has
gone ?
Vincent
2013/10/7
Hi Sébastien,
Even in pure C you can not declare too large static arrays (it also
results in SEGFAULT). Dynamical allocation (with malloc or calloc) is
more flexible for huge chunks of memory.
My comment is just empirical...
Vincent
2013/10/10, Sébastien Labbé :
> Hi sage-devel,
>
> I
even
>> donate some income to Sage).
>
> A company doesn't host a cloud running Sage, and there is no income.
> That said, after getting funding in various ways over 8 years for this
> project, I think the only hope Sage has of breaking into mainstream
> usage is
Great! Thanks William!
2013/10/20 William Stein :
> On Oct 20, 2013 6:44 AM, "vdelecroix" <20100.delecr...@gmail.com> wrote:
>>
>> Hi,
>>
>> I am not able to connect to ask.sagemath.org. I was using the service
>> which becomes suddenly unavaila
Hi,
There is a dedicated list for the package [1]. I am not yet an
intensive user so I can not answer.
Best,
Vincent
[1] https://sympa.obspm.fr/wws/info/sagemanifolds.list
2013/10/28, Dox :
> Hi dear community:
>
> I've seen the examples given in the homepage of
> s
ement implementation...
Vincent
2013/10/28, Rob Beezer :
> SetPartitions() used to create sets of sets (as of, say January 2013).
> That seems to be broken as most common methods on sets will fail (but not
> all). Any ideas on a simple fix or a good workaround (or an indication of
> what I am doi
xecutables
2) use easy_install from Sage ended with an error of compatibility of
versions (which is I guess a bug of the configure script)
3) build it from source ended similarly as 2.
Does anybody have some experience with it ?
Thanks,
Vincent
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Vincent
2013/10/29, Travis Scrimshaw :
> Hey,
>
> On Monday, October 28, 2013 7:17:50 PM UTC-7, Mike Zabrocki wrote:
>>
>> I am not sure, but I believe that this was probably changed in #14140
>> when SetPartition was changed fro
example my question in [1].
Best,
Vincent
[1] http://ask.sagemath.org/question/2415/polynomial-and-interval-arithmetic
2013/10/29, Volker Braun :
> This is called ball arithmetic and was jut implemented in FLINT by Fredrik
> Johannson,
> e.g. http://fredrikj.net/blog/2012/04/high-preci
epsilon) as the
precision of the interval might be small compared to the precision of
the center.
>> That being said, and if you care about good error bounds and as far as
>> I understand, RIF is not well suited for polynomial or serie
>> evaluation. See for example my question in [1].
possible to make the second works as well ?
Note: I am using Action from sage.categories.action and
.register_action in the parent
Thanks
Vincent
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you do not ask the
same question to a real number (floor, is_positive, etc) and a p-adic
one (valuation, etc).
Best,
Vincent
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nd
the ones which should not ?
Vincent
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characteristic polynomial.
I would be happy to have comments as I am not familiar with algorithms
over finite fields.
Best,
Vincent
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am completely stuck here. For the moment, my hack is to make
SchemeMorphism_polynomial not inherit from SchemeMorphism. This is
just crazy!
Please help
Vincent
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Hi Darij,
Great news! I will play with it today and see what I can do (for the
review and eigenvalues).
Thanks,
Vincent
2013/11/7, Darij Grinberg :
> Hi Vincent,
>
> trac ticket #14990 has just been updated this week. Not reviewed, though.
>
> Best regards,
> Darij
Thank you Robert, Jean-Pierre and Simon. I see what I can do from your
suggestions.
2013/11/8, Simon King :
> Hi Vincent,
>
> On 2013-11-08, Vincent Delecroix <20100.delecr...@gmail.com> wrote:
>> I was working with #15378 and I wondered why SchemeMorphism inherits
>>
Hi,
The part of the log you paste is not long enough. I guess you need to
install msgfmt which is not part of standard debain. The name of the
package is gettext.
Does anybody know why git is a standard spkg ? It is likely that
anybody has his/her own git...
Vincent
2013/11/10, Ralf Hemmecke
think that this is the best of what can
happen for Sage but I also think that we need an agreement of all Sage
developers that spkg can not be patched...
All best,
Vincent
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hard to me to understand how sage currently deals with libraries
and programs. And it is even harder to understand Felix solution.
Could someone try to explain where should I look ?
Thanks,
Vincent
2013/11/11, Julien Puydt :
> Le 11/11/2013 19:31, Volker Braun a écrit :
>> On Monday, No
nProduct still exist ?
I would be happy to fix that if I know what to do.
Best,
Vincent
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Salut Nicolas,
Thanks for taking care of it. I would like cartesian products to be
smarter about iteration... especially when one of the factor is
infinite. I have a working implementation of the iterator that you can
use on the sage-combinat misc repo.
Best,
Vincent
2013/11/15, Nicolas M
Hi,
FXT [1] that Nathan mentioned seems very nice... and GPL... but is not
yet a standard spkg of Sage! Does it make sense to create a spkg for
it ? It is mentionned on trac only in #7656 about bitsets.
Best
Vincent
[1] http://www.jjj.de/fxt/fxtpage.html
2013/12/6, Nathann Cohen :
> Yoo
extra layer with
symbolic polynomial. Most of the time, the symbolic ring should just
be avoided. And I guess a long term goal of Sage would be to make it
disappear.
Vincent
2013/12/18, maldun :
> Why reinvent the wheel? A symbolic polynomal class should be capable of a
> type checking
And meromorphic functions are not stable under composition...
2013/12/19, Nils Bruin :
> On Wednesday, December 18, 2013 11:04:22 PM UTC-10, maldun wrote:
>>
>> What I mean is that we should only allow expressions of meromorphic
>> functions in the symbolic field, i.e. we would only allow variable
Does polynomial over non-commutative ring make sense ? Because in that
context axbx is not abx^2. Depending on what you call polynomial, they
may or may not form a ring.
2013/12/21, Marc Mezzarobba :
> According to the docstring of PolynomialRing(), the base ring of a
> polynomial ring has to be c
efficiently if
an object is a numpy int. I would be happy to work on it but the best
strategy is not yet completely clear to me.
Best,
Vincent
2014/1/4, Thierry :
> Hi,
>
> On Sat, Jan 04, 2014 at 01:03:21AM +0100, Harald Schilly wrote:
>> Here is a problem maybe somebody can help
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