#12930: Poset of Alternating sign matrices
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Reporter: aschilling | Owner:
sage-combinat
Type: enhancement | Status:
needs_review
Priority: major | Milestone:
sage-5.1
Component: combinatorics | Resolution:
Keywords: alternating sign matrices, posets, days38 | Work issues:
Report Upstream: N/A | Reviewers:
Authors: Frédéric Chapoton | Merged in:
Dependencies: | Stopgaps:
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Changes (by aschilling):
* cc: pierre.cagne@… (added)
Comment:
Replying to [comment:2 chapoton]:
> I have implemented the reverse bijection under the name
"to_contre_tableau"
>
> I have also implemented the lattice, but only for alternating sign
matrices, because contre-tableau are not hashable.
Thanks Frederic for implementing this! However, at Sage Days 38 Pierre
Cagne <[email protected]> also implemented this bijection and the poset.
He got over the problem of nonhashable matrices. I recently contacted him
to post his patch, but have not heard since. I added his e-mail to this
ticket. Hopefully he will post his patch here as well.
Best wishes,
Anne
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12930#comment:3>
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