Separators Are as Simple as Cutsets

  • Authors:
  • Hong Shen;Keqin Li;Si-Qing Zheng

  • Affiliations:
  • -;-;-

  • Venue:
  • ASIAN '99 Proceedings of the 5th Asian Computing Science Conference on Advances in Computing Science
  • Year:
  • 1999

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Abstract

We show that all minimal a-b separators (vertex sets) disconnecting a pair of given non-adjacent vertices a and b in an undirected and connected graph with n vertices can be computed in O(n2Rab) time, where Rab is the number of minimal a-b separators. This result matches the known worst-case time complexity of its counterpart problem of computing all a-b cutsets (edge sets) [13] and solves an open problem posed in [11].