#10037: cddlib/Polyhedron bug
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   Reporter:  mhampton  |       Owner:  mhampton                     
       Type:  defect    |      Status:  new                          
   Priority:  major     |   Milestone:                               
  Component:  geometry  |    Keywords:  cddlib, polyhedron, polyhedra
     Author:            |    Upstream:  N/A                          
   Reviewer:            |      Merged:                               
Work_issues:            |  
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 The following causes cddlib to crash; I'm not sure if this is fixable
 without patching the cddlib source:
 {{{
 p4 = polytopes.permutahedron(5,project=True)
 pn4 = p4.projection()
 p3  = pn4.schlegel()
 verts = p3.transformed_coords
 edges = p3.lines
 topes = []
 for q in p4.facial_incidences():
     topes.append([verts[i] for i in q[1]])
 Polyhedron(vertices=topes[3], field=RDF, verbose=True)
 }}}

 output ends with:
 {{{
 Facet graph
 *Error: Possibly an LP cycling occurs.  Use the Criss-Cross method.
 }}}

-- 
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10037>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica, 
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