#12361: Fix normalization in cohomology ring of orbifold toric varieties
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   Reporter:  vbraun              |          Owner:  AlexGhitza  
       Type:  defect              |         Status:  new         
   Priority:  major               |      Milestone:  sage-5.0    
  Component:  algebraic geometry  |       Keywords:              
Work_issues:                      |       Upstream:  N/A         
   Reviewer:                      |         Author:  Volker Braun
     Merged:                      |   Dependencies:              
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 For simplicial toric varieties, the rational cohomology ring and the
 ratironal Chow group are isomorphic. So if all normalizations are correct,
 then one should be able to do intersection computations in the cohomology
 ring. This patch fixes the `volume_class()` and the constructor of
 cohomology cycles from cones to make everything work.

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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12361>
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