#8579: Add the categories of magmas and additive magmas
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   Reporter:  nthiery            |       Owner:  nthiery          
       Type:  defect             |      Status:  needs_review     
   Priority:  major              |   Milestone:  sage-4.4         
  Component:  categories         |    Keywords:  categories, magma
     Author:  Nicolas M. ThiƩry  |    Upstream:  N/A              
   Reviewer:                     |      Merged:                   
Work_issues:                     |  
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Description changed by nthiery:

Old description:

> This patch adds the categories Magmas() and AdditiveMagmas()
> (sets with a plain binary operation * or +).
>
> It factors out some of the code previously in Semigroups /
> CommutativeAdditiveSemigroups.
>
> This is used by the updated #7555 to make it more general.

New description:

 This patch adds the categories Magmas() and AdditiveMagmas()
 (sets with a plain binary operation * or +).

 It factors out some of the code previously in Semigroups /
 CommutativeAdditiveSemigroups.

 This is used by the updated #7555 to make it more general.

 Depends trivially on #7880.

--

-- 
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/8579#comment:3>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica, 
and MATLAB

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