Good morning, Nicolas!
I finalized the new crystal patches (affine-E-as.patch,
affine-E-revised-as.patch). I left the facade = True option
for direct sums when no crystal is repeated. Also, HighestWeightCrystals
now only takes one weight as input. In the process I removed the
__class__ method whi
On Sun, Jan 31, 2010 at 11:00:01PM -0800, Anne Schilling wrote:
> Actually, affine.py is more of a "helper" file for kirillov_reshetikhin.py
> where all references are listed. Is this sufficient or do you also want them
> listed here (or a reference to kirillov_reshetikhin.py in this file)?
It fee
On Mon, Feb 01, 2010 at 09:33:20AM -0800, Anne Schilling wrote:
> sage: K = KirillovReshetikhinCrystal(['A',2,1],1,1)
> sage: L = KirillovReshetikhinCrystal(['A',2,1],1,2)
> sage: f = K.R_matrix(L)
> sage: [[b,f(b)] for b in TensorProductOfCrystals(K,L)]
> ...
> sage: K = KirillovReshetikhinCrystal
Hello!
On Mon, Feb 01, 2010 at 09:24:05AM -0800, Anne Schilling wrote:
> You say this since the elements in the direct sum will have different
> parents depending in which B_i they sit in? I guess turning
> facade = False should fix this problem.
Indeed. But there will be a price to pay:
Dear Dan,
I suppose it is easiest for everyone to add it to the upcoming patch.
Ok!
What is the combinatorial R-matrix?
The combinatorial R-matrix is an affine crystal isomorphisms
R: K \otimes L \to L \otimes K
where K and L are Kirillov-Reshetikhin crystals. It maps
u_
Hello Nicolas,
Hmm, I would say not quite. But we can discuss this later on.
You say this since the elements in the direct sum will have different
parents depending in which B_i they sit in? I guess turning
facade = False should fix this problem.
Some other questions I had last night which I
Good morning Anne!
On Mon, Feb 01, 2010 at 07:48:07AM -0800, Anne Schilling wrote:
> >Just one thing though: with facade = True, the elements of the crystal
> >won't know that their parent is the direct sum crystal. This may, or
> >may not, be a problem in practice. It's a good occasion to
On Mon, Feb 01, 2010 at 07:35:06AM -0800, bump wrote:
> I did not notice until now that the patch supposedly depends on
> #8028. I applied the patch to unmodified 4.3.1 and ran Sage
> --testall and got no failures. I can do it again with #8028 applied
> first, but let me ask what is the nature of t
Nicolas M. Thiery wrote:
On Sun, Jan 31, 2010 at 10:28:11PM -0800, Anne Schilling wrote:
I have implemented the direct sum of crystals in the patch crystal-hw-as.patch.
The good news is that in the case when there are no multiplicities in the B_i,
one can use the options keepkey = False, facade
I wrote:
> I checked that the patch trac_7978_crystal_cleanup-as.2.patch
> passes sage --testall.
I did not notice until now that the patch supposedly depends on
#8028. I applied the patch to unmodified 4.3.1 and ran Sage
--testall and got no failures. I can do it again with #8028 applied
first,
I suppose it is easiest for everyone to add it to the upcoming patch.
What is the combinatorial R-matrix?
> I can certainly add more references and explanation for affine.py.
> Do you prefer this in 7978 or can I add this in the new upcoming patch?
>
> Best wishes,
>
> Anne
--
You received this
On Sun, Jan 31, 2010 at 10:28:11PM -0800, Anne Schilling wrote:
> I have implemented the direct sum of crystals in the patch
> crystal-hw-as.patch.
>
> The good news is that in the case when there are no multiplicities in the B_i,
> one can use the options keepkey = False, facade = True
> and the
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