#10911: inverse() method for permutation group elements
----------------------------+-----------------------------------------------
Reporter: rbeezer | Owner: joyner
Type: defect | Status: new
Priority: minor | Milestone: sage-4.7
Component: group theory | Keywords:
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
----------------------------+-----------------------------------------------
Patch aims to resolve the following inconsistency, by providing a
`.inverse()` method for permutation group elements.
{{{
sage: S = SymmetricGroup(4)
sage: s = S("(1,2,3)")
sage: type(s)
<type
'sage.groups.perm_gps.permgroup_element.PermutationGroupElement'>
sage: s^-1
(1,3,2)
sage: s.inverse()
(1,3,2)
sage: A = AlternatingGroup(4)
sage: a = A("(1,2,3)")
sage: type(a)
<type
'sage.groups.perm_gps.permgroup_element.PermutationGroupElement'>
sage: a^-1
(1,3,2)
sage: a.inverse()
---------------------------------------------------------------------------
AttributeError Traceback (most recent call
last)
<snip>
AttributeError:
'sage.groups.perm_gps.permgroup_element.PermutationGroupElement' object
has no attribute 'inverse'
}}}
Some discussion at http://groups.google.com/group/sage-
devel/browse_thread/thread/683315261a6c6def
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10911>
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