#12464: Improved uniqueness for combinatorial free modules
-------------------------------------------------+--------------------------
   Reporter:  hivert                             |          Owner:  hivert      
                                             
       Type:  enhancement                        |         Status:  needs_work  
                                             
   Priority:  major                              |      Milestone:  sage-5.0    
                                             
  Component:  combinatorics                      |       Keywords:  
CombiantorialFreeModule, UniqueRepresentation, Cernay2012
Work_issues:                                     |       Upstream:  N/A         
                                             
   Reviewer:  Nicolas M. Thiéry, Florent Hivert  |         Author:  Florent 
Hivert, Nicolas Thiéry                           
     Merged:                                     |   Dependencies:              
                                             
-------------------------------------------------+--------------------------
Changes (by jdemeyer):

  * status:  positive_review => needs_work


Comment:

 Could this cause
 {{{
 sage -t  -force_lib
 devel/sage/doc/en/thematic_tutorials/lie/iwahori_hecke_algebra.rst
 **********************************************************************
 File "/mnt/usb1/scratch/jdemeyer/merger/sage-5.0.beta4/devel/sage-
 main/doc/en/thematic_tutorials/lie/iwahori_hecke_algebra.rst", line 54:
     sage: H = IwahoriHeckeAlgebraT("B3",q); H
 Exception raised:
     Traceback (most recent call last):
       File
 "/mnt/usb1/scratch/jdemeyer/merger/sage-5.0.beta4/local/bin/ncadoctest.py",
 line 1231, in run_one_test
         self.run_one_example(test, example, filename, compileflags)
       File
 "/mnt/usb1/scratch/jdemeyer/merger/sage-5.0.beta4/local/bin/sagedoctest.py",
 line 38, in run_one_example
         OrigDocTestRunner.run_one_example(self, test, example, filename,
 compileflags)
       File
 "/mnt/usb1/scratch/jdemeyer/merger/sage-5.0.beta4/local/bin/ncadoctest.py",
 line 1172, in run_one_example
         compileflags, 1) in test.globs
       File "<doctest __main__.example_0[3]>", line 1, in <module>
         H = IwahoriHeckeAlgebraT("B3",q); H###line 54:
     sage: H = IwahoriHeckeAlgebraT("B3",q); H
       File
 "/mnt/usb1/scratch/jdemeyer/merger/sage-5.0.beta4/local/lib/python/site-
 packages/sage/misc/classcall_metaclass.py", line 274, in __call__
         return cls.__classcall_private__(cls, *args, **options)
       File
 "/mnt/usb1/scratch/jdemeyer/merger/sage-5.0.beta4/local/lib/python/site-
 packages/sage/algebras/iwahori_hecke_algebra.py", line 174, in
 __classcall_private__
         return super(IwahoriHeckeAlgebraT, cls).__classcall_private__(cls,
 W, q1=q1, q2=q2, base_ring=base_ring, prefix=prefix)
     TypeError: __classcall_private__() got multiple values for keyword
 argument 'base_ring'
 **********************************************************************
 }}}

-- 
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12464#comment:3>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica, 
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