#19495: Fixes a bug in is_mutation_finite for ClusterSeed
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Reporter: benstrasser | Owner:
Type: defect | Status: needs_work
Priority: major | Milestone: sage-6.10
Component: combinatorics | Resolution:
Keywords: cluster | Merged in:
Authors: Ben Strasser | Reviewers: Travis Scrimshaw
Report Upstream: N/A | Work issues:
Branch: | Commit:
u/benstrasser/fixes_a_bug_in_is_mutation_finite_for_clusterseed|
5bcfa49f3093baf873391585af1f1605049d5d37
Dependencies: | Stopgaps:
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Description changed by benstrasser:
Old description:
> Fixes an issue for the is_mutation_finite method of ClusterSeed on a
> single vertex digraph.
New description:
Fixes an issue for the is_mutation_finite method of ClusterSeed.
This method would enter an infinite loop when called on the ClusterSeed of
a single vertex digraph.
In order to avoid mutating twice in the same direction, the code would
enter an indefinite loop (which could not terminate on a single vertex).
This ticket corrects the issue by returning 'True' for the single vertex
case before the indefinite loop can begin.
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Ticket URL: <http://trac.sagemath.org/ticket/19495#comment:10>
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