#9972: Add toric lattice morphisms
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Reporter: novoselt | Owner: mhampton
Type: enhancement | Status: needs_work
Priority: major | Milestone: sage-4.6
Component: geometry | Keywords:
Author: Andrey Novoseltsev | Upstream: N/A
Reviewer: Volker Braun | Merged:
Work_issues: switch to FanMorphism |
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Comment(by vbraun):
A fan is a collection of cones. A point is never in a fan, as it is not a
cone. I don't think we should make cones unique in general, only cones of
a fan. You can have arbitrarily many cones (memory permitting), but the
cones of a fan are a finite set; To me it then feels right to have the
`Cone_of_fan` be unique. In the current implementation they actually are
unique after the fan is constructed. So it ends up being a minor change to
guarantee that they are always unique, I think.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/9972#comment:16>
Sage <http://www.sagemath.org>
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