#10046: Polyhedron's incidence_matrix performs poorly on some numerical input
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Reporter: mhampton | Owner: mhampton
Type: defect | Status: new
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):
This is not a reasonable simplex, it is one with razor-sharp teeth ready
to gnaw your leg off:
{{{
sage: v = test.Vrepresentation()
sage: matrix([vector(v[0]), vector(v[2]), vector(v[3])]).det()
-1.64748394458e-07
}}}
That said, it would be nice if cdd could work with doubles instead of
float for ~16 accurate digits. PPL can do that easily using templates and
c++.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10046#comment:1>
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