#17411: Added colored and signed permutations
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Reporter: tscrim | Owner: sage-combinat
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-6.5
Component: combinatorics | Resolution:
Keywords: permutations, | Merged in:
complex reflection groups | Reviewers:
Authors: Travis Scrimshaw | Work issues:
Report Upstream: N/A | Commit:
Branch: | 24b4b4fe83f7453c155714439ff255e576e5f652
public/combinat/colored_permutation_groups-17411| Stopgaps:
Dependencies: |
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Comment (by kdilks):
Comments so far:
* Make 'number_reflecting_hyperplanes' 'number_of_reflecting_hyperplanes',
because that's the way permutation statistics names methods.
* Documentation should mention somewhere that \ell is the number of
degrees is the rank. Some docstrings just refer to \ell, and maybe you
could look back and see that \ell is the number of degrees, but then
nothing mentions that the number of the degrees is the same as the rank.
* Why just left descent and not right descent?
* Colored permutations should have an inverse operation.
* There should be element constructors {{{ColoredPermutation}}} and
{{{SignedPermutation}}}.
* For {{{m=2}}}, there should be a way to get between thinking of
something as a {{{SignedPermutation}}} and a {{{ColoredPermutation}}}.
* Codegree documentation needs a {{{.. Math::}}} around the formula.
* Preliminary docstring/index of functions would be nice, but possibly a
task for another ticket.
--
Ticket URL: <http://trac.sagemath.org/ticket/17411#comment:16>
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