About randomised distributed graph colouring and graph partition algorithms

  • Authors:
  • Y. Métivier;J. M. Robson;N. Saheb-Djahromi;A. Zemmari

  • Affiliations:
  • Université de Bordeaux, LaBRI, UMR CNRS 5800, 351 cours de la Libération, 33405 Talence, France;Université de Bordeaux, LaBRI, UMR CNRS 5800, 351 cours de la Libération, 33405 Talence, France;Université de Bordeaux, LaBRI, UMR CNRS 5800, 351 cours de la Libération, 33405 Talence, France;Université de Bordeaux, LaBRI, UMR CNRS 5800, 351 cours de la Libération, 33405 Talence, France

  • Venue:
  • Information and Computation
  • Year:
  • 2010

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Abstract

We present and analyse a very simple randomised distributed vertex colouring algorithm for arbitrary graphs of size n that halts in time O(logn) with probability 1-o(n^-^1). Each message containing 1 bit, its bit complexity per channel is O(logn). From this algorithm, we deduce and analyse a randomised distributed vertex colouring algorithm for arbitrary graphs of maximum degree @D and size n that uses at most @D+1 colours and halts in time O(logn) with probability 1-o(n^-^1). We also obtain a partition algorithm for arbitrary graphs of size n that builds a spanning forest in time O(logn) with probability 1-o(n^-^1). We study some parameters such as the number, the size and the radius of trees of the spanning forest.