#16926: Merge the features of SymmetricGroupAlgebra and SymmetricGroup.algebra
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Reporter: nthiery | Owner:
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-6.4
Component: combinatorics | Resolution:
Keywords: | Merged in:
Authors: Travis Scrimshaw | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
public/combinat/fix_sga-16926 | f38fe13587fac895809d5f9d5fcf21b12bd23f0a
Dependencies: | Stopgaps:
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Comment (by darij):
Not done yet (symgp_conjugacy_class.py) remains, but there are some things
I don't get about this that I'd prefer to have answered before I go on.
- The _mul_ issue, as above.
- The meaning of the index_set parameter: is it just there to allow
building the symmetric group algebra with different basis keys?
- _coerce_map_from_ claims that there exists a coercion from
SymmetricGroup(3).algebra(QQ) to SymmetricGroupAlgebra(QQ, 3), but
applying this coercion to elements fails. This is because
`StandardPermutations_n_abstract.__call__` does not take a permutation
group element as a parameter. I am not sure what to do about it, since I
wouldn't be happy with duck-typing in that constructor.
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Ticket URL: <http://trac.sagemath.org/ticket/16926#comment:31>
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