#13431: Add sign as an alias for signature for permutations
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Reporter: cremona | Owner: tbd
Type: enhancement | Status: new
Priority: minor | Milestone: sage-5.4
Component: PLEASE CHANGE | Keywords: permutation
Work issues: | Report Upstream: N/A
Reviewers: | Authors:
Merged in: | Dependencies:
Stopgaps: |
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As I reported on sage-devel:
{{{
sage: pi = permutations(4)[4]
sage: pi.signature()
1
sage: pi.sign()
...
AttributeError: 'Permutation_class' object has no attribute 'sign'
}}}
and as was also mentioned:
{{{
sage: G = SymmetricGroup(2)
sage: a = G("(1,2)")
sage: a.sign()
-1
}}}
The proposal is to add sign as an alias to signature for the class
'sage.combinat.permutation.Permutation_class' by adding a single line to
sage/combinat/permutation.py saying "sign = signature"
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13431>
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