A global parallel algorithm for the hypergraph transversal problem

Leonid Khachiyan, Endre Boros, Khaled Elbassioni, Vladimir Gurvich

Research output: Contribution to journalArticlepeer-review

27 Scopus citations


We consider the problem of finding all minimal transversals of a hypergraph H ⊆ 2V, given by an explicit list of its hyperedges. We give a new decomposition technique for solving the problem with the following advantages: (i) Global parallelism: for certain classes of hypergraphs, e.g., hypergraphs of bounded edge size, and any given integer k, the algorithm outputs k minimal transversals of H in time bounded by polylog (| V |, | H |, k) assuming poly (| V |, | H |, k) number of processors. Except for the case of graphs, none of the previously known algorithms for solving the same problem exhibit this feature. (ii) Using this technique, we also obtain new results on the complexity of generating minimal transversals for new classes of hypergraphs, namely hypergraphs of bounded dual-conformality, and hypergraphs in which every edge intersects every minimal transversal in a bounded number of vertices.

Original languageBritish English
Pages (from-to)148-155
Number of pages8
JournalInformation Processing Letters
Issue number4
StatePublished - 28 Feb 2007


  • Bounded dimension
  • Conformal hypergraph
  • Dualization
  • Global parallel algorithm
  • Hypergraph
  • Incremental generating
  • Maximal independent set
  • Minimal transversal
  • Parallel processing


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