#10046: Polyhedron's incidence_matrix performs poorly on some numerical input
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Reporter: mhampton | Owner: mhampton
Type: defect | Status: needs_review
Priority: major | Milestone: sage-4.6.1
Component: geometry | Keywords:
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Comment(by vbraun):
You are right, the problem is that cdd fixes the overall scale of the
`<0,2,3>` supporting inequality by scaling the constant term to unity, not
that the simplex is degenerate. cdd should normalize the normal vector to
unity instead, but not blow up the coefficients just because the
supporting hypersurface comes close to the origin.
This needs to be addressed within cddlib, we can't just renormalize the
cddlib output. I think it would be a waste of time to try to fix up
cddlib, though.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10046#comment:6>
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