#16779: Isogeny construction fails over relative number fields
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       Reporter:  cremona                        |        Owner:
           Type:  defect                         |       Status:  new
       Priority:  major                          |    Milestone:  sage-6.3
      Component:  elliptic curves                |   Resolution:
       Keywords:  isogeny relative number field  |    Merged in:
        Authors:  John Cremona                   |    Reviewers:
Report Upstream:  N/A                            |  Work issues:
         Branch:                                 |       Commit:
   Dependencies:                                 |     Stopgaps:
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Comment (by cremona):

 See also #11327 where a more thorough solution was proposed, but not
 finished, in 2011.  The patch here does not solve the issue there
 (constructing duals of 2-isogenies over function fields).

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Ticket URL: <http://trac.sagemath.org/ticket/16779#comment:1>
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