#11010: Implementation of the SubwordComplex as defined by Knutson and Miller
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Reporter: stumpc5 | Owner: tbd
Type: enhancement | Status: needs_work
Priority: major | Milestone: sage-6.2
Component: combinatorics | Resolution:
Keywords: subword complex, | Merged in:
simplicial complex | Reviewers:
Authors: Christian Stump | Work issues: coverage
Report Upstream: N/A | Commit:
Branch: u/chapoton/11010 | 88643156a58720df968a0cb95e38f94668871a1a
Dependencies: #12774 | Stopgaps:
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Comment (by stumpc5):
Replying to [comment:17 chapoton]:
Hi,
> I would be happy to see you come back here. The code is not very easy to
understand by me alone.
I spend some time today trying to get Sage working properly again, but I
failed so far. I guess I need someone helping me to work properly with
git...
* I upgraded Sage using
http://wiki.sagemath.org/TentativeConventions#Get_the_latest_official_development_version_of_Sage,
but I got an error ```error: command 'gcc' failed with exit status```, so
this is my first problem
I don't know how to resolve that now (and I also don't know if I tried to
upgrade to the newest development version or the latest stable version).
> The remaining issues (15 doctests) seem to be related to a strange use
of roots, where Weyl group elements seem to be supposed to act on the
indices of roots in the list of roots. And they do not, of course.
I use the CHEVIE implementation of finite reflection groups which are
implemented as permutation groups on indices of roots. This speed things
drastically, but it is not reall mathematically clean. Moreover, I just
looked at the code, and
* I also pushed many non-features that are there only for my research (and
for which I cannot prove what I want to prove)
* Many features only make sense for finite Coxeter groups, so such checks
are still to be implemented.
--
Ticket URL: <http://trac.sagemath.org/ticket/11010#comment:18>
Sage <http://www.sagemath.org>
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