#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 etn40ff):
Hi Christian,
thank you for the advices on the use of trac: I am quite new to all of it.
Thank you also for catching the problem with the if statement: I uploaded
an old version of the patch; sorry about that.
As for the last point here is my reasoning:
I agree with you that this is not an optimal way of coding this function;
the first idea I had was to add a method to translate
`QuiverMutationType` into `CartanType`. 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. We
could translate `QuiverMutationType` into a pair `(CartanType,
Permutation)` but I am not sure this would be any better. Slightly
annoying is also the fact that `CartanType` labels nodes from 1 while
`QuiverMutationType` from 0.
I will shortly update a new version of the patch including your
observations.
S.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/14844#comment:2>
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