#9296: Add lattice computations for convex polyhedral cones
---------------------------+------------------------------------------------
Reporter: vbraun | Owner: mhampton
Type: enhancement | Status: new
Priority: major | Milestone: sage-4.4.4
Component: geometry | Keywords:
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Various computations in toric geometry rely on the (saturated)
N-sublattice generated by a cone and its complement and projections onto
these. And, similarly, for the dual cones in the M-lattice. This patch
adds what is necessary for Chow group and sheaf cohomology computations
later on.
Prerequisites:
- #9062 - Add support for toric lattices
- #8986 - Add support for convex rational polyhedral cones
- #9188 - lattice_polytope.facet_normal bug with polytopes of less that
full dimension
- #8987 - Add support for rational polyhedral fans
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/9296>
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