#7734: edge_coloring loops forever when GLPK is not installed
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Reporter: ncohen | Owner: rlm
Type: defect | Status: positive_review
Priority: major | Milestone: sage-4.3.1
Component: graph theory | Keywords:
Work_issues: | Author: Nathann Cohen
Upstream: N/A | Reviewer: Robert Miller
Merged: |
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Comment(by rlm):
Replying to [comment:5 ncohen]:
> Thank you for your help !!!
>
> do you have an example for which it takes some time ? I would also like
to try to improve it a bit :-)
>
{{{
sage: from sage.graphs.graph_coloring import vertex_coloring
sage: g = graphs.CirculantGraph(120, [2,3,5,7])
sage: vertex_coloring(g)
}}}
It takes longer to set up the constraint than to solve the problem, on my
laptop.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/7734#comment:6>
Sage <http://www.sagemath.org>
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