#13649: Implement sigma.domain() and sigma.codomain() for sigma a permutation
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       Reporter:  nthiery               |         Owner:  joyner  
           Type:  enhancement           |        Status:  new     
       Priority:  major                 |     Milestone:  sage-5.5
      Component:  group theory          |    Resolution:          
       Keywords:  beginner, agregation  |   Work issues:          
Report Upstream:  N/A                   |     Reviewers:          
        Authors:                        |     Merged in:          
   Dependencies:                        |      Stopgaps:          
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Comment (by vbraun):

 Replying to [comment:3 lazza]:
 > Should I do it at the element level or in the parent set?

 I'd say both. Everything with a `domain()` would ideally have a
 `codomain()`.

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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13649#comment:4>
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