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Primal-dual 2-approximation for weighted vertex cover

Also called Bar-Yehuda and Even algorithm, local ratio vertex cover.

Raise edge duals until a vertex becomes tight; tight vertices form a 2-approximate cover.

Raise edge duals until a vertex becomes tight; tight vertices form a 2-approximate cover.

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LadderLevelWhat the next level needs
Human proofH0 no proof
  • add a proof in proofs/ (06.5)
LeanL0 no Lean part
  • name a Lean module in the lean field (07)
VisualV0 none
  • add viz/scene.ts or a figure (10)
WritingW0 stub
  • the section The problem
  • pseudocode in The algorithm
  • complexity claims in the front matter
  • one source with a locator