#12876: Fix element and parent classes of Hom categories to be abstract, and
simplify the Hom logic.
------------------------------------------+---------------------------------
       Reporter:  nthiery                 |         Owner:  nthiery             
      
           Type:  enhancement             |        Status:  needs_review        
      
       Priority:  major                   |     Milestone:  sage-5.4            
      
      Component:  categories              |    Resolution:                      
      
       Keywords:  categories, Hom         |   Work issues:  fix doctests and 
segfaults
Report Upstream:  N/A                     |     Reviewers:  Simon King          
      
        Authors:  Nicolas M. ThiƩry       |     Merged in:                      
      
   Dependencies:  #11521, #12215, #12313  |      Stopgaps:                      
      
------------------------------------------+---------------------------------

Comment (by SimonKing):

 When removing the _Hom_ alias, I get
 {{{
         sage -t  -force_lib
 devel/sage/sage/rings/multi_power_series_ring_element.py # 5 doctests
 failed
 }}}
 So, apparently it ''is'' needed.

-- 
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12876#comment:70>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica, 
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