#11598: Change to is_congruence method of modular subgroups
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   Reporter:  davidloeffler  |          Owner:  craigcitro                 
       Type:  defect         |         Status:  needs_review               
   Priority:  major          |      Milestone:  sage-4.7.2                 
  Component:  modular forms  |       Keywords:  modular congruence subgroup
Work_issues:                 |       Upstream:  N/A                        
   Reviewer:                 |         Author:  David Loeffler             
     Merged:                 |   Dependencies:  #11422                     
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Comment(by davidloeffler):

 Just realised that, since the new algorithm in the odd case is *extremely*
 slow, it is better to not call it from the generic test routine! Here's a
 new patch.

-- 
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11598#comment:2>
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