#14291: Orbits of tuples and sets
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Reporter: ncohen | Owner: joyner
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-5.9
Component: group theory | Resolution:
Keywords: | Work issues:
Report Upstream: N/A | Reviewers:
Authors: Nathann Cohen | Merged in:
Dependencies: | Stopgaps:
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Comment (by vbraun):
1. `@cached_method` must not return lists, but only immutable things
{{{
sage: S3.orbit(3)
[3, 1, 2]
sage: type(_)
list
}}}
Just return a tuple.
2. It would be nice if orbit were smarter about the action type and make
the output a set/tuple if necessary. For example, desirable behaviour
would be
{{{
sage: S3.orbit(3) # in domain, use OnPoints
(1, 2, 3)
sage: S3.orbit((1,2)) # not in domain, a tuple, use OnTuples
((1, 2), (2, 3), (2, 1), (3, 1), (1, 3), (3, 2))
sage: S3.orbit({1,2}) # not in domain, a set, use OnSets
({1, 2}, {2, 3}, {1, 3})
}}}
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/14291#comment:28>
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