#9972: Add fan morphisms
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   Reporter:  novoselt                          |       Owner:  mhampton    
       Type:  enhancement                       |      Status:  needs_review
   Priority:  major                             |   Milestone:  sage-4.6.1  
  Component:  geometry                          |    Keywords:              
     Author:  Andrey Novoseltsev, Volker Braun  |    Upstream:  N/A         
   Reviewer:  Volker Braun, Andrey Novoseltsev  |      Merged:              
Work_issues:                                    |  
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Changes (by novoselt):

  * status:  needs_work => needs_review


Comment:

 Indeed, it does not work and moreover - the error was in `image_cone`.

 I have updated the main patch by adding a special branch for the image of
 the trivial cone and inserted your example into `preimage_cones`
 docstring.

-- 
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/9972#comment:52>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica, 
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