#13183: Implement index(cone) for fan morphisms
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Reporter: novoselt | Owner: mhampton
Type: enhancement | Status: new
Priority: major | Milestone: sage-5.2
Component: geometry | Resolution:
Keywords: toric | Work issues:
Report Upstream: N/A | Reviewers:
Authors: Andrey Novoseltsev | Merged in:
Dependencies: | Stopgaps:
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Comment (by novoselt):
Hi Volker, does the description definition sound OK?
The patch also improves handling of (non-saturated) sublattices and
quotient lattices. In the process I had to cut `_split_ambient_lattice` -
it will not split the dual one anymore. Note that this dual splitting was
not documented and was used only to construct the dual quotient lattice -
I have reimplemented the latter one in a more mathematically
straightforward way, everything works as before, but choice of generators
in doctest examples is now different (I checked that it is equivalent).
I'll put a ready for review version in a few days.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13183#comment:1>
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