#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 | 18b3441e41e0f30b6bc02bd5a746096b17189e27
Dependencies: | Stopgaps:
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Comment (by tscrim):
`__contains__` is a definite no because the subclasses want that to use
that check. However, I moved `__iter__` and a bunch of other methods to
`StandardPermutations_n` since they were (potentially) giving wrong
results. I also used `itertools` for the iteration because it was ~20x
faster:
{{{
sage: %timeit len(list(itertools.permutations(range(1,6), 5)))
10000 loops, best of 3: 36.5 µs per loop
sage: %timeit len(list(Permutations_set._fast_iter(range(1,6))))
1000 loops, best of 3: 658 µs per loop
}}}
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Ticket URL: <http://trac.sagemath.org/ticket/16926#comment:22>
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