#18199: sage.geometry.polyhedron should have an lrs backend
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Reporter: mkoeppe | Owner:
Type: enhancement | Status: new
Priority: major | Milestone: sage-wishlist
Component: geometry | Keywords: polyhedron, lrs
Merged in: | Authors:
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
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Sage already has lrs as an optional package.
For higher-dimensional polytopes, computing vertices by lrs is often much
faster than the implementations of the double description method in cddlib
and ppl.
Sage should have a backend_lrs.py to make use of the existing lrs package.
Links to older discussions regarding lrs:
[https://groups.google.com/forum/#!topic/sage-support/AZRzY7JyG_Y]
[https://groups.google.com/forum/#!topic/sage-devel/oH6Jrjs-HUY]
As has been said in these discussions, lrs also has a key benefit that it
can generate the vertices as a stream, with very little memory use.
Ideally, this feature could be exposed using Python generators. However,
this would seem to require extending the Polyhedron interface.
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Ticket URL: <http://trac.sagemath.org/ticket/18199>
Sage <http://www.sagemath.org>
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