Is there something in sage that will return integer matrices with row
sums (4, 4, 0, 5) and column sums (3, 7, 1, 0, 2) ? (for example)
I have something that does this in the NCSF code on the queue, but I'm
wondering whether it is already implemented.
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Hi Mike,
I did some timing tests on the old and new code:
sage: Sym = SymmetricFunctions(QQ['q','t'].fraction_field())
sage: s = Sym.schur()
sage: m = Sym.monomial()
sage: timeit('m(s([6,3,3,2,1]))')
25 loops, best of 3: 8.51 ms per loop
sage: timeit('m(s([10,6,3,3,2,1]))')
5 loops, best of 3: 21
Hi Mike,
Very impressive work! I am glad you took over my initial patch.
I will send you more comments off-line except for the main issues
that need to be discussed with everyone.
Franco:
>> Moreover, LLT polynomials, Hall-Littlewood, Jack and Macdonald symmetric
>> functions have all been moved
On Thu, Jun 7, 2012 at 12:26 PM, Mike Zabrocki wrote:
> Hey SFA users...
>
> I've been working on a patch to change how symmetric functions are used in
> the future. I will be deprecating some common functions soon on the sage
> combinat queue and we will try to get this into sage in an upcoming
Hi,
I should add that one thing that should really be tested in addition to
behavior is *speed*!
With these changes there might be potential slow-down from previous
versions.
We don't want this to happen. I've tested a bit, but this is one thing
that is even more difficult to identify than a b
Hey SFA users...
I've been working on a patch to change how symmetric functions are used in
the future. I will be deprecating some common functions soon on the sage
combinat queue and we will try to get this into sage in an upcoming
version. Starting soon: SFAxxx where xxx in {Schur, Monomial
I have been working on an implementation of braid groups for sage
(together with free and finitely presented groups). So far i have a
preliminary version (see ticket #12339). It is still not feature
complete and also very slow compared to cbraid[1], for example, but it
is usable.
In order to speed
