#8421: Change BipartiteGraph .left and .right to sets
----------------------------+-----------------------------------------------
Reporter: rhinton | Owner: rlm
Type: defect | Status: new
Priority: major | Milestone: sage-4.3.4
Component: graph theory | Keywords: BipartiteGraph, partitions, sets
Author: Ryan Hinton | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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The documentation describes the 'left' and 'right' attributes of
BipartiteGrpah as sets. And deleting vertices is much more efficient if
they are. But they are currently stored as lists.
{{{
sage: bg = BipartiteGraph(graphs.CycleGraph(4))
sage: bg.left
[0, 2]
}}}
Of course, it's easy to change from one to the other. But we will get
better performance from sets.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/8421>
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