#17798: Create a class for Coxeter matrices and types
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Reporter: tscrim | Owner: sage-combinat
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-6.6
Component: group theory | Resolution:
Keywords: Coxeter, groups, | Merged in:
matrices, types | Reviewers:
Authors: Travis Scrimshaw | Work issues:
Report Upstream: N/A | Commit:
Branch: | e61a4f3927c1d096f8ece1138ed33abbd928594d
public/combinat/coxeter_matrices-17798| Stopgaps:
Dependencies: |
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Comment (by darij):
I fear I cannot be of much help with this ticket, as I don't even know the
difference between a Coxeter and a Cartan type... But please simplify that
`CoxeterMatrix.__init__`. It is so complicated it is not pythonic in any
good sense of this word. Python's the weak type system should not keep us
from writing constructors (e.g., `from_cartan_type`) tailored to specific
input data. I have no idea why catch-all constructors have become a
standard in Sage, but this kind of programming gave us #17124 and probably
some more ugliness I don't remember.
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Ticket URL: <http://trac.sagemath.org/ticket/17798#comment:6>
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