Opened 12 years ago

Closed 12 years ago

#8421 closed defect (fixed)

Change BipartiteGraph .left and .right to sets

Reported by: rhinton Owned by: rhinton
Priority: major Milestone: sage-4.4
Component: graph theory Keywords: BipartiteGraph, partitions, sets
Cc: rlm, jason, ncohen Merged in: sage-4.4.alpha0
Authors: Ryan Hinton Reviewers: Robert Miller
Report Upstream: N/A Work issues:
Branch: Commit:
Dependencies: Stopgaps:

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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.

Attachments (1)

trac_8421-bipartite-partition-sets.patch (8.8 KB) - added by rhinton 12 years ago.
updated commit message

Download all attachments as: .zip

Change History (5)

comment:1 Changed 12 years ago by rhinton

  • Owner changed from rlm to rhinton

comment:2 Changed 12 years ago by rhinton

  • Status changed from new to needs_review

Patch implements change. It sits on my MQ stack on top of #8331 and #8329, but I don't think either of these are required.

Changed 12 years ago by rhinton

updated commit message

comment:3 Changed 12 years ago by rlm

  • Reviewers set to Robert Miller
  • Status changed from needs_review to positive_review

comment:4 Changed 12 years ago by jhpalmieri

  • Merged in set to sage-4.4.alpha0
  • Resolution set to fixed
  • Status changed from positive_review to closed

Merged "trac_8421-bipartite-partition-sets.patch" into 4.4.alpha0

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