#13649: Implement sigma.domain() and sigma.codomain() for sigma a permutation
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Reporter: nthiery | Owner: joyner
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-5.6
Component: group theory | Resolution:
Keywords: beginner, aggregation | Work issues:
Report Upstream: N/A | Reviewers:
Authors: Andrea Lazzarotto | Merged in:
Dependencies: | Stopgaps:
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Comment (by vbraun):
For me, range = codomain. Whereas image = subset of codomain. Its probably
the most popular definition but not universally accepted. This potential
for confusion is why we avoid "range" in Sage altogether and only have
domain and codomain.
http://en.wikipedia.org/wiki/Image_(mathematics)#Other_terminology
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13649#comment:9>
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