#13599: Bugfix in is_cartesian_product
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Reporter: ncohen | Owner: jason, ncohen, rlm
Type: defect | Status: new
Priority: major | Milestone: sage-5.5
Component: graph theory | Keywords:
Work issues: | Report Upstream: N/A
Reviewers: | Authors: Nathann Cohen
Merged in: | Dependencies:
Stopgaps: |
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Helloooooooooo everybody !!!
Georgi Guninski reported by email the following bug :
{{{
sage: g = graphs.WagnerGraph()
sage: g.is_cartesian_product()
ValueError: Something weird happened during the algorithm... Please report
the bug and give us the graph instance that made it fail !!!
}}}
Well, it is not very bad as the ``is_cartesian_product`` function is made
to return only results that it can check for correction, so an exception
is raised when the algorithm sees something wrong.
Anyway. I opened another book which told me what I should add to fix this
bug, and the patch that follows fixes it. I'm glad when working on Sage
teaches me some graph theory `:-)`
Nathann
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13599>
Sage <http://www.sagemath.org>
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