#7159: [with patch, needs review] Graph.merge_vertices, and a bug in
edge_boundary
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Reporter: ncohen | Owner: rlm
Type: defect | Status: needs_work
Priority: major | Milestone: sage-4.2.1
Component: graph theory | Keywords:
Work_issues: | Author:
Reviewer: | Merged:
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Changes (by AJonsson):
* status: needs_review => needs_work
Comment:
Great minds think alike ;-)
I just made a ticket ( #7304 ) for edge contraction, but this ticket is
more general, so closing mine as a duplicate.
However, there is something wrong in your patch, as my first try revealed
this:
{{{
sage: P=graphs.PetersenGraph()
sage: P.merge_vertices([5,7])
sage: P.vertices()
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
}}}
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/7159#comment:2>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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