#8519: Add a set of Positive Integer with categories (and factor the code with
NonNegativeInteger)
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   Reporter:  nborie         |       Owner:  nborie          
       Type:  enhancement    |      Status:  new             
   Priority:  major          |   Milestone:  sage-4.3.4      
  Component:  combinatorics  |    Keywords:  positive integer
     Author:                 |    Upstream:  N/A             
   Reviewer:                 |      Merged:                  
Work_issues:                 |  
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Comment(by nthiery):

 +1!

 That will be useful for NCSF too (see the beginning of
 sage/combinat/ncsf/categories.py).

 Just mind the 's': PositiveIntegers

 Let me guess: TransitiveGroup(0,1) does not work, right? Maybe it should
 actually?

-- 
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/8519#comment:1>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica, 
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