#5537: [with patch, not ready for review] bug in __cmp__ in
permgroup_element.pyx
--------------------------+-------------------------------------------------
Reporter: jhpalmieri | Owner: joyner
Type: defect | Status: new
Priority: major | Milestone: sage-3.4.2
Component: group_theory | Keywords:
--------------------------+-------------------------------------------------
From [http://groups.google.com/group/sage-
support/browse_frm/thread/5dcc22b42a7227d4 sage-support]:
{{{
sage: h = PermutationGroupElement('(1,3,2)')
sage: k = PermutationGroupElement('(1,2,3),(4,5)')
sage: h
(1,3,2)
sage: k^2
(1,3,2)
sage: k^2 == h, h == k^2
(False, True)
}}}
Clearly these comparisons should return the same thing. robertwb pointed
out in the thread that, especially since the parents are not explicitly
defined here, they should both return True.
I'll post a patch, but I don't know much about this code, and I don't want
to slow things down too much. If anyone else has a faster way, please
produce a new patch.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/5537>
Sage <http://sagemath.org/>
Sage - Open Source Mathematical Software: Building the Car Instead of
Reinventing the Wheel
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