#9713: Add toric Chow group
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Reporter: vbraun | Owner: AlexGhitza
Type: enhancement | Status: needs_work
Priority: major | Milestone: sage-4.6.1
Component: algebraic geometry | Keywords:
Author: Volker Braun | Upstream: N/A
Reviewer: Andrey Novoseltsev | Merged:
Work_issues: |
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Comment(by vbraun):
When I wrote the code I tried to make `gens()` return the union of the the
fixed-degree generators but that did not work. I don't remember what
exactly went wrong, but bad things happen if `gens()` is different from
the generators that `FGP_Module` choses.
I mostly added `ChowGroup_degree_class` so that the individual degree
pieces can `_repr_()` themselves nicely. One could make them parents again
with some coercion in the full Chow group, but that seems to be a big
effort. I definitely want to allow mixed-degree Chow group elements, so we
can't get rid of the whole Chow group.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/9713#comment:24>
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