#13638: fix adjacency of rays
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Reporter: vbraun | Owner: mhampton
Type: defect | Status: needs_review
Priority: major | Milestone: sage-5.5
Component: geometry | Resolution:
Keywords: | Work issues:
Report Upstream: N/A | Reviewers:
Authors: Volker Braun | Merged in:
Dependencies: | Stopgaps:
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Comment (by dimpase):
Replying to [comment:12 vbraun]:
> I'm basing the nomenclature on "Representations of Convex Polyhedra" in
the PPL docs
[http://bugseng.com/products/ppl/documentation#%2Fproducts%2Fppl%2Fdocumentation%2F%2Fdevref
%2Fppl-devref-1.0-html%2Findex.html ppl], if you want a reference. The
representation is always reduced.
Do I understand you right that you're "unrolling" a minimal
V-representation when building up your adjacencies? E.g. if your
polyhedron is a polytope plus a ray then you have to "paste" a ray into
each vertex, and this gives you your parallel "half-infinite edges"?
Hmm, and what do you do if your polyhedron has no vertices at all? (E.g.
it's a half-plane?)
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13638#comment:13>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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