#17855: create is_preperiodic function for points of projective space
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       Reporter:  bhutz              |        Owner:  bhutz
           Type:  enhancement        |       Status:  needs_review
       Priority:  minor              |    Milestone:  sage-6.6
      Component:  algebraic          |   Resolution:
  geometry                           |    Merged in:
       Keywords:                     |    Reviewers:
        Authors:  Ben Hutz           |  Work issues:
Report Upstream:  N/A                |       Commit:
         Branch:                     |  f2f641403f8e05e7345a2ffb132b6cfcb8695b9b
  u/bhutz/ticket/17855               |     Stopgaps:
   Dependencies:                     |
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Changes (by {'newvalue': u'Ben Hutz', 'oldvalue': ''}):

 * status:  new => needs_review
 * author:   => Ben Hutz


Comment:

 This incorporated a few additional changes

 - there was an error in the error_bound canonical height computations
 which is now corrected

 - heights and canonical heights are now computable for QQbar points

 - methods to change QQbar points and maps to number field points and maps

 - change_ring now accepts an embedding for points and maps

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Ticket URL: <http://trac.sagemath.org/ticket/17855#comment:3>
Sage <http://www.sagemath.org>
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