#13546: Bug in is_perfect
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Reporter: azi | Owner: jason, ncohen, rlm
Type: defect | Status: needs_review
Priority: critical | Milestone: sage-5.7
Component: graph theory | Resolution:
Keywords: is_perfect,graph theory | Work issues:
Report Upstream: N/A | Reviewers: Jernej Azarija,
Sébastien Labbé
Authors: Nathann Cohen | Merged in:
Dependencies: #8952 | Stopgaps:
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Comment (by ncohen):
Well... Because Sebastien told me yesterday that "there was a bug" when he
typed `Graph(mygraph.sparse6_string()).is_perfect`, and the reason is that
when you build a graph from a sparse6 string, the graph (even tough it
does not have loops nor multiple edges) *allows them*. And when you
compute the complement of that graph, you get multiple edges and loops,
which was a problem.
Well. It's up to you, really. I don't care either way. And I hate labels,
multiple edges, and loops `:-P`
Nathann
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13546#comment:16>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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