#6588: Categories for root systems and many misc improvements
--------------------------------------------------------------+-------------
   Reporter:  nthiery                                         |          Owner: 
 mhansen                 
       Type:  enhancement                                     |         Status: 
 needs_review            
   Priority:  major                                           |      Milestone: 
 sage-5.0                
  Component:  combinatorics                                   |       Keywords: 
 root systems, categories
Work_issues:                                                  |       Upstream: 
 N/A                     
   Reviewer:  Anne Schilling, Mark Shimozono, Florent Hivert  |         Author: 
 Nicolas M. ThiƩry       
     Merged:                                                  |   Dependencies: 
 #10817                  
--------------------------------------------------------------+-------------
Changes (by nthiery):

  * status:  needs_work => needs_review


Comment:

 Thanks Jeroen for the report. This should be fixed with the upcoming
 patch. The diff is:
 {{{
 #!diff
 diff --git a/sage/combinat/root_system/dynkin_diagram.py
 b/sage/combinat/root_system/dynkin_diagram.py
 --- a/sage/combinat/root_system/dynkin_diagram.py
 +++ b/sage/combinat/root_system/dynkin_diagram.py
 @@ -165,8 +165,8 @@ class DynkinDiagram_class(DiGraph, Carta
          EXAMPLES::

              sage: hash(CartanType(['A',3]).dynkin_diagram()) # indirect
 doctest
 -            286820813001824631
 -
 +            286820813001824631     # 64-bit
 +            -2127980169            # 32-bit
          """
          # Should assert for immutability!

 }}}

-- 
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/6588#comment:39>
Sage <http://www.sagemath.org>
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