#11950: Bug in topological_sort
----------------------------+-----------------------------------------------
Reporter: andrejv | Owner: jason, ncohen, rlm
Type: defect | Status: new
Priority: major | Milestone: sage-4.7.3
Component: graph theory | Keywords:
Work_issues: | Upstream: N/A
Reviewer: | Author:
Merged: | Dependencies:
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There is a bug in topological_sort for digraphs:
{{{
sage: D = DiGraph('IR??C?G?OOAOGc@??o')
sage: D.topological_sort()
[0, 1, 4, 9, 6, 7, 5, 8, 3, 2, 1]
}}}
A correct answer is returned from networkx:
{{{
sage: D.topological_sort(implementation="NetworkX")
[0, 4, 9, 6, 7, 5, 8, 3, 2, 1]
}}}
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11950>
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