#17798: Create a class for Coxeter matrices and types
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Reporter: tscrim | Owner: sage-combinat
Type: enhancement | Status: needs_work
Priority: major | Milestone: sage-6.6
Component: group theory | Resolution:
Keywords: Coxeter, groups, | Merged in:
matrices, types, days64 | Reviewers:
Authors: Travis Scrimshaw, | Work issues:
Jean-Philippe Labbé | Commit:
Report Upstream: N/A | 86b2d78d02683fee74b77742fee3ffd45ffb2e29
Branch: | Stopgaps:
public/combinat/coxeter_matrices-17798|
Dependencies: #17990 |
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Changes (by {'newvalue': u'Travis Scrimshaw, Jean-Philippe Labb\xe9',
'oldvalue': u'Travis Scrimshaw'}):
* keywords: Coxeter, groups, matrices, types => Coxeter, groups, matrices,
types, days64
* cc: jmichel (added)
* author: Travis Scrimshaw => Travis Scrimshaw, Jean-Philippe Labbé
Old description:
> This is a partial step towards #16126, but carries the necessary
> information to speed up #16630 when the input is given as a finite
> !Cartan/Coxeter type.
New description:
This is a partial step towards #16126, but carries the necessary
information to speed up #16630 when the input is given as a finite
!Cartan/Coxeter type.
There are a few things TO DO in the current patch:
- Subdivided the init into smaller methods
- Maybe change the name of CoxeterType.py to type_coxeter?
- Added doctests
- Add a __getitem__ method using the index_set
- Remove the inheritance from matrix_generic_dense
- add _matrix_ method
- put is_finite, is_affine in attributes
- put samples in Coxetertype
- improve the check_coxeter_type code
Eventually, maybe create an abstract class for Coxeter matrices and Cartan
matrices?
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Ticket URL: <http://trac.sagemath.org/ticket/17798#comment:15>
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