#8709: polyhedra level set doctest failure
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Reporter: jhpalmieri | Owner: mhampton
Type: defect | Status: new
Priority: major | Milestone: sage-4.4
Component: geometry | Keywords:
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Comment(by novoselt):
It looks like some sorting issue. I personally think that it would be nice
to have some standard sorting of faces (and it is nice to have this
sorting documented).
!LatticePolytope's sort faces of dimension 0 according to the generating
vertices (so that the i-th 0-dimensional face is generated by the i-th
vertex) and codimension 1 faces according to the containing facets (so
that the i-th codimension-1 face is contained in the i-th facet). I think
that these ways of sorting are very natural and it would be nice to have
the same for Polyhedra with its V- and H-representations. For other faces
there is probably no "canonical" choice, but it would be nice to have
something fixed. (Middle dimensional faces of !LatticePolytope's are
sorted using one of the above ways, depending on working with an "initial
polytope" or its polar - this is done to preserve polar duality of faces
for reflexive polytopes.)
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/8709#comment:1>
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