#14844: Implement cluster algebras with universal coefficients
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Reporter: etn40ff | Owner: sage-combinat
Type: enhancement | Status: needs_info
Priority: minor | Milestone: sage-5.12
Component: combinatorics | Resolution:
Keywords: cluster algebras | Work issues:
Report Upstream: N/A | Reviewers:
Authors: Salvatore Stella | Merged in:
Dependencies: | Stopgaps:
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Comment (by nthiery):
Hi Salvatore,
Replying to [comment:2 etn40ff]:
> Unfortunately we need slightly more than what `CartanType` provides:
> it is important to able to choose an ordering of the simple roots (a
> labeling of the vertices of the quiver if you prefer) and this is
> not possible in the current implementation.
Can you be specific? Could CartanType(["A",4]).relabel(...) be useful?
> Slightly annoying is also the fact that `CartanType` labels nodes
> from 1 while `QuiverMutationType` from 0.
Just to clarify: it turns out that the classical cartan types (A_4,
...) label their nodes starting from 1 to match the usual
conventions. But the code makes no assumption whatsoever about this;
so you don't have to follow the same labeling for your own Cartan
types.
Cheers,
Nicolas
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/14844#comment:3>
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