#16386: matching_polynomial of Grid2dGraph bombs
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Reporter: rws | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.3
Component: graph theory | Resolution:
Keywords: grid graph | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
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Comment (by chapoton):
You need first to rebabel the graph
{{{
sage: g = graphs.Grid2dGraph(4,4)
sage: g.relabel()
sage: g.matching_polynomial()
x^16 - 24*x^14 + 224*x^12 - 1044*x^10 + 2593*x^8 - 3388*x^6 + 2150*x^4 -
552*x^2 + 36
}}}
Its probably because the matching polynomial assumes that vertices are
integers.
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Ticket URL: <http://trac.sagemath.org/ticket/16386#comment:1>
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