#12940: Combinatorial implementation of the affine symmetric group
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Reporter: sdenton | Owner: tom denton
Type: enhancement | Status: new
Priority: minor | Milestone: sage-5.6
Component: combinatorics | Resolution:
Keywords: affine, combinatorics, days38 | Work issues:
Report Upstream: N/A | Reviewers:
Authors: tom denton | Merged in:
Dependencies: | Stopgaps:
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Comment (by schilly):
Replying to [comment:12 sdenton]:
> Hello!
>
> I've been trying to get this expanded and finished up. The following
changes happened lately:
>
> * Changed the names of things to AffinePermutation and
AffinePermutationGroup, because:
> * I added affine permutation groups of types ABCDG. (E and F are in
Eriksson, but are ugly; I want to think about whether there's a cleaner
way to go about these ones.)
> * Everything is just in the file affine_permutations.py, which sits
directly in sage/combinat
>
> I'm now getting a problem I can't figure out, though: Sage is refusing
to import the AffinePermutationGroup name. It doesn't seem to be
previously defined, and when I disable all of the import statements I
still get an error (so it can't be an import loop; also, nothing calls my
file...). I can manually attach the file just fine, too.
>
> I've stared at this a good long time and haven't been able to figure out
what's going wrong...
Anne tries to write: Don't you mean non-twisted rather than non-
exceptional? Type G is exceptional!
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12940#comment:13>
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