An optimal parallel algorithm for c-vertex-ranking of trees

  • Authors:
  • Md. Abul Kashem;M. Ziaur Rahman

  • Affiliations:
  • Department of Computer Science and Engineering, Bangladesh University of Engineering and Technology, Dhaka 1000, Bangladesh;School of Computer Science, University of Waterloo, Canada

  • Venue:
  • Information Processing Letters
  • Year:
  • 2004

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Abstract

For a positive integer c, a c-vertex-ranking of a graph G=(V,E) is a labeling of the vertices of G with integers such that, for any label i, deletion of all vertices with labels i leaves connected components, each having at most c vertices with label i. The c-vertex-ranking problem is to find a c-vertex-ranking of a given graph using the minimum number of ranks. In this paper we give an optimal parallel algorithm for solving the c-vertex-ranking problem on trees in O(log"2n) time using linear number of operations on the EREW PRAM model.