#8451: improve galois representation for elliptic curves
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   Reporter:  wuthrich         |       Owner:  cremona                          
                    
       Type:  defect           |      Status:  needs_review                     
                    
   Priority:  major            |   Milestone:  sage-4.3.4                       
                    
  Component:  elliptic curves  |    Keywords:  elliptic curves, galois 
representation, is_surjective
     Author:  Chris Wuthrich   |    Upstream:  N/A                              
                    
   Reviewer:                   |      Merged:                                   
                    
Work_issues:                   |  
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Changes (by wuthrich):

  * status:  new => needs_review


Comment:

 The patch should fix the bug and add plenty of trivial functionality to
 galois representations attached to elliptic curves. It should also give a
 new function {{{image_type}}} that tries to determine the image. Currently
 this gives back a string rather than a group. Also, it does not determine
 it completely in some cases, like when there is an isogeny is only says
 that the image is contained in the Borel, but does not try to determine if
 it is the full Borel or not. If someone wants this, we can try to add it
 later.

-- 
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/8451#comment:2>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica, 
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