A minor inconvenience is the extra set of parentheses that appear
when typesetting QQ elements as arguments of functions, e.g.
--
| Sage Version 4.3.2, Release Date: 2010-02-06 |
| Type notebook() for the GUI
On Wed, Feb 17, 2010 at 11:47 AM, Ondrej Certik wrote:
> On Wed, Feb 17, 2010 at 11:34 AM, Ethan Coon wrote:
>> Ok, so I uploaded an spkg, but it's not exactly right yet. A few issues:
>>
>> 1. my stupidity -- the flag should actually be --FLIBS="f95" , not
>> --FFLAGS="-lf95*". This isn't nece
On Feb 17, 7:57 am, javier wrote:
> Hi all,
>
> I am trying to use sage to compute the Artin-Wedderburn decomposition
> of a group algebra.
I am curious to know, how you are doing this. IMHO for this you need
to know
each irreducible representation explicitly --- but then you can just
stack up
default must be gfortran, IMHO.
Sage is distributed with a copy of gfortran libs in case they are not
installed on the machine
that will run Sage.
There is a mechanism in Sage to detect fortrans that are available.
Anyhow, gfrortan is much more wide-spread on Linux (e.g. g95 is not a
part of Deb
Hi all,
thanks for the tip-off in CombinatorialFreeModule, I have been trying
to use this, but cannot find any sensible way to make it work.
sage: G = SymmetricGroup(3)
sage: B = sorted(list(G))
sage: n = len(B)
sage: K = CyclotomicField(n)
sage: A = GroupAlgebra(G,K)
sage: V = CombinatorialFreeM
on Linux, this can be obtained from /proc
http://www.cyberciti.biz/faq/linux-display-cpu-information-number-of-cpus-and-their-speed/
On Feb 17, 4:51 pm, "Dr. David Kirkby"
wrote:
> There seems to be a lot of problems that either are, or might be associated
> with
> people using binaries on older
There seems to be a lot of problems that either are, or might be associated with
people using binaries on older CPUs than what they are made on. (e.g see the
thread "A command which causes Sage to crash" on sage-support).
It would be useful if there was a script or something which detected the
Dear all,
My patch #7921 broke tab completion under emacs in 4.3.2 due to a
variant of the other tab completion bug. I know how painful this can
be, and apologize for this. I just created ticket #8296 for this, and
posted a patch which should fix the issue. Please try and review!
Best,
ok, still me :P
I've found the relevant ticket http://trac.sagemath.org/sage_trac/ticket/7501
now I'll try to apply the patch. it seems to me that this is actively
worked on, and there should be some draft code on someone else's
computer, so I am probably not any helpful here.
cheers
maurizio
O
I am sorry,
yesterday I started to work on this, but I was working on sage 4.2
today I updated to sage 4.3.2, but I also noticed that in the
beginning of the file cell.py it is stated that it is part of the OLD
sage notebook...
now I should understand where to look again :)
maurizio
On 17 Feb, 21
hi all,
I do not want to set any expectation, but I'd take some help with a
small experiment
I wanted to try to introduce codemirror in the notebook. as previously
suggested by this list, it seems the most mature solution for syntax
highlighting. I have tried myself bespin, and it is very feature-l
>> I don't think you can have automated conversion like C(a^2 + b^2) since it
>> makes sense to define:
>> sage: C = CombinatorialFreeModule(QQ, [ a^2, b^2, a*b, a^2+b^2 ])
>> sage: 2*C.basis()[a^2] + C.basis()[b^2]
>> B[b^2] + 2*B[a^2]
>> sage: 2*C.basis()[a^2] + C.basis()[b^2 + a^2]
>> 2*B[a^2] +
I don't think you can have automated conversion like C(a^2 + b^2)
since it
makes sense to define:
sage: C = CombinatorialFreeModule(QQ, [ a^2, b^2, a*b, a^2+b^2 ])
sage: 2*C.basis()[a^2] + C.basis()[b^2]
B[b^2] + 2*B[a^2]
sage: 2*C.basis()[a^2] + C.basis()[b^2 + a^2]
2*B[a^2] + B[a^2 + b^2]
The
Hi Nick,
> With an old version of sage, this is unfortunately not all that useful for
> my purpose. Not sure how to address this, since there is not a standard
> way to convert a multivariate polynomial into such an expression. Perhaps
> things have improved since this version was
On 17-Feb-10, at 10:03 AM, Nicolas M. Thiery wrote:
On Wed, Feb 17, 2010 at 08:53:23AM -0800, Nick Alexander wrote:
PS: FWIW, in this kind of problem having a nice
"VectorSpaceWithBasis"
so that I could define a vector space with basis given by the group
elements, would come really fancy.
On Wed, Feb 17, 2010 at 11:34 AM, Ethan Coon wrote:
> Ok, so I uploaded an spkg, but it's not exactly right yet. A few issues:
>
> 1. my stupidity -- the flag should actually be --FLIBS="f95" , not
> --FFLAGS="-lf95*". This isn't necessary to get a working PETSc and
> petsc4py, but it is both mo
On Wed, Feb 17, 2010 at 08:53:23AM -0800, Nick Alexander wrote:
> >PS: FWIW, in this kind of problem having a nice "VectorSpaceWithBasis"
> >so that I could define a vector space with basis given by the group
> >elements, would come really fancy.
>
> I also want this! Various people in the combina
On Feb 17, 8:53 am, Nick Alexander wrote:
> > PS: FWIW, in this kind of problem having a nice "VectorSpaceWithBasis"
> > so that I could define a vector space with basis given by the group
> > elements, would come really fancy.
>
> I also want this! Various people in the combinat group suggested
On 17 February 2010 15:01, chris wuthrich wrote:
>> Did you install the optional database before running the test? That
>> changes which generators are returned for database curves.
>
> Yes, the optional database was installed before.
>
> Does that that mean that the lines should have a #somethin
PS: FWIW, in this kind of problem having a nice "VectorSpaceWithBasis"
so that I could define a vector space with basis given by the group
elements, would come really fancy.
I also want this! Various people in the combinat group suggested they
had it/were working on it, but I don't know the s
Hi Nicolas,
> What do you mean by exact? I am using CyclotomicFields on a regular
> basis for similar things, and this works well. And I would expect it
> to be faster than QQbar.
You are right, I guess I could just use CyclotomicField(n) where n is
the order of the group and everything should wo
On 17-Feb-10, at 8:27 AM, Nicolas M. Thiery wrote:
On Wed, Feb 17, 2010 at 07:50:57AM -0800, javier wrote:
Apparently I was assuming too much. The result of the evaluation of
the character belongs to some cyclotomic field, so apparently the
problem is that there is not a coercion between cyclo
On Wed, Feb 17, 2010 at 07:50:57AM -0800, javier wrote:
> Apparently I was assuming too much. The result of the evaluation of
> the character belongs to some cyclotomic field, so apparently the
> problem is that there is not a coercion between cyclotomic fields and
> QQbar. I can circumvent the pro
On Feb 17, 2:57 pm, javier wrote:
> Observe that in this situation the numbers I am trying to coerce into
> K are rational:
Apparently I was assuming too much. The result of the evaluation of
the character belongs to some cyclotomic field, so apparently the
problem is that there is not a coercion
All doctests pass under 64-bit Fedora 10.
Kiran
--
To post to this group, send an email to sage-devel@googlegroups.com
To unsubscribe from this group, send an email to
sage-devel+unsubscr...@googlegroups.com
For more options, visit this group at http://groups.google.com/group/sage-devel
URL: ht
> Did you install the optional database before running the test? That
> changes which generators are returned for database curves.
Yes, the optional database was installed before.
Does that that mean that the lines should have a #something, because
they are #random depending on #optional ?
Chri
Hi all,
I am trying to use sage to compute the Artin-Wedderburn decomposition
of a group algebra. Since I need exact expressions I am working over
QQbar rather than over CC. When trying to compute the idempotents I
get an error resulting from an attempt to coerce a rational number
into QQbar. A mi
Hi Jason,
Sorry for the multiple answers:
> >> However, I really wonder whether this fix is necessary. I understand the
> >> the bug pointed out is a bad bug, but I think that when I call
> >> zero_matrix() I will usually quickly modify the returned matrix. Are
> >> there many useful situat
On 02/15/2010 03:23 PM, William Stein wrote:
> I'm sure it will get implemented. I don't think it will be that hard.
> It's just a matter of time. It would likely just involve changing
> the function "load" in SAGE_ROOT/devel/sage/sage/misc/preparser.py
I've posted a first take at
http://trac
Hi Jason,
>> However, I really wonder whether this fix is necessary. I understand the
>> the bug pointed out is a bad bug, but I think that when I call
>> zero_matrix() I will usually quickly modify the returned matrix. Are
>> there many useful situations where it is important that M =
>> ze
On 17 February 2010 00:24, William Stein wrote:
> On Tue, Feb 16, 2010 at 4:05 PM, François Bissey
> wrote:
>> Hi,
>>
>> it seems that the author of sympow left the University of Bristol.
>> Consequently his homepage there has been removed along with
>> sympow sources. Does anyone knows where it
31 matches
Mail list logo
