#1314: graphs: calculate tutte polynomial
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Reporter: jason | Owner: rlm
Type: enhancement | Status: new
Priority: major | Milestone: sage-wishlist
Component: graph theory | Resolution:
Keywords: | Work issues:
Report Upstream: N/A | Reviewers:
Authors: | Merged in:
Dependencies: | Stopgaps:
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Comment (by lkeough):
Replying to [comment:17 mhansen]:
> {{{x}}} and {{{y}}} should ideally be integer polynomials (i.e.,
{{{R.<x,y> = ZZ[]}}}) -- then you don't have to deal with manually
"expanding".
>
I see now! This makes it much better. If we put R.<x,y> = ZZ[] as the
first line in the Tutte polynomial code it does this for us. Doing that
shouldn't mess anything up, right?
> Additionally, in the {{{tuttepolynomial.sage}}} code, you should
probably be caching a canonical label of the graph -- see the
{{{cache_key}}} method in my patch.
Will do!
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/1314#comment:18>
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