#10334: miscellaneous cleanup in perm_gps preparing for domains
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Reporter: mhansen | Owner: joyner
Type: enhancement | Status: needs_work
Priority: minor | Milestone: sage-4.7
Component: group theory | Resolution:
Keywords: | Work_issues:
Upstream: N/A | Reviewer: Robert Miller
Author: Mike Hansen | Merged:
Dependencies: |
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Comment(by rbeezer):
Forgot some details above.
On clean 4.7.rc0 the "is_abelian" returns {{{True}}. This is a doctest
that has been passing in alpha testing.
On patched version, the commutator is a subgroup, and it is normal:
{{{
sage: G = DihedralGroup(20)
sage: C = G.commutator()
sage: C.is_subgroup(G)
True
sage: C.is_normal(G)
True
}}}
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10334#comment:20>
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