#9245: Add library of toric varieties
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Reporter: vbraun | Owner: AlexGhitza
Type: enhancement | Status: needs_review
Priority: major | Milestone:
Component: algebraic geometry | Keywords:
Author: Volker Braun | Upstream: N/A
Reviewer: Andrey Novoseltsev | Merged:
Work_issues: |
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Comment(by vbraun):
Thanks, good catch... I was somehow under the impression that the dict
sorts by keys. In any case, your solution is cleaner.
My reason for splitting off the ray/cones data into a separate structure
was that one could use it to reverse lookup a toric variety. The first
step would be to check the "combinatorial" isomorphism of the cones, and
only later the slower "lattice" isomorphism of the fan. For the coordinate
names, on the other hand, we don't need a fast way to list them all, so
that data can just stay in the individual methods.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/9245#comment:15>
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