#9138: Categories for all rings
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   Reporter:  jbandlow                                               |          
Owner:  nthiery                                                       
       Type:  defect                                                 |         
Status:  needs_review                                                  
   Priority:  major                                                  |      
Milestone:  sage-4.7.2                                                    
  Component:  categories                                             |       
Keywords:  introspection, categories for rings                           
Work_issues:  comparison of BooleanPolynomialRings; one doctest fix  |       
Upstream:  N/A                                                           
   Reviewer:                                                         |         
Author:  Simon King                                                    
     Merged:                                                         |   
Dependencies:  sage-4.7, #11268, #11139, #9976, #9944, #11269, #11316, #11342
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Changes (by SimonKing):

  * status:  needs_work => needs_review


Comment:

 I have updated the second patch. Since the ticket now depends on #11342, I
 added a fix for pari ring doctest. Also, I completely removed the
 `__richcmp__` and `_cmp_` code from the boolean polynomial rings, since
 the code is actually not needed anymore (they are unique parents, and thus
 `R==S`  is the same as `R is S`.

 For me, the long tests pass. I hope they do for you as well?

-- 
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/9138#comment:101>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica, 
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