#9296: Add lattice computations for convex polyhedral cones
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Reporter: vbraun | Owner: mhampton
Type: enhancement | Status: needs_info
Priority: major | Milestone: sage-4.5
Component: geometry | Keywords:
Author: Volker Braun | Upstream: N/A
Reviewer: Andrey Novoseltsev | Merged:
Work_issues: |
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Comment(by vbraun):
I'm fine with the names, but submodules of `FreeModule` echelonizes the
base:
{{{
sage: L = FreeModule(ZZ, 3)
sage: Lsub = L.submodule( [[1,1,2],[4,3,2]] );
sage: Lsub.gens()
((1, 0, -4), (0, 1, 6))
}}}
For toric purposes, we need generators to lie in the "positive half-space"
(as defined by the cone spanning the sublattice) for one-dimensional
sublattices.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/9296#comment:18>
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