#11474: Elliptic curves should be unique parent structures
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       Reporter:  SimonKing        |        Owner:  cremona
           Type:  defect           |       Status:  needs_info
       Priority:  major            |    Milestone:  sage-6.2
      Component:  elliptic curves  |   Resolution:
       Keywords:  unique parent    |    Merged in:
        Authors:  Simon King       |    Reviewers:
Report Upstream:  N/A              |  Work issues:
         Branch:                   |       Commit:
   Dependencies:                   |     Stopgaps:
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Comment (by pbruin):

 There is also the related question on whether an elliptic curve ''E''
 itself or the Abelian group of rational points of ''E'' should be regarded
 as the parent of the rational points of ''E''.  Same question for the
 (co)domain of isogenies; see #12880.

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Ticket URL: <http://trac.sagemath.org/ticket/11474#comment:8>
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