#15550: Implement the Kirchhoff-Symanzik polynomial for graphs
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Reporter: chapoton | Owner:
Type: enhancement | Status: needs_review
Priority: minor | Milestone: sage-6.1
Component: graph theory | Resolution:
Keywords: symanzik polynomial | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: u/ncohen/15550 | Commit:
Dependencies: | Stopgaps:
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Changes (by chapoton):
* status: new => needs_review
* type: task => enhancement
* branch: => u/ncohen/15550
Old description:
> This is a polynomial in several variables, useful in the study of Feynman
> diagrams.
>
> This either needs a generator of spanning trees, or a cycle_basis for
> multiple graphs.
>
> Not as obvious as it may look.
New description:
This is a polynomial in several variables, useful in the study of Feynman
diagrams.
Done using a determinant (matrix-tree theorem)
I had to use an auxiliary function.
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Ticket URL: <http://trac.sagemath.org/ticket/15550#comment:2>
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