On the recursive largest first algorithm for graph colouring

  • Authors:
  • G. Palubeckis

  • Affiliations:
  • Department of Practical Informatics, Kaunas University of Technology, Kaunas, Lithuania

  • Venue:
  • International Journal of Computer Mathematics
  • Year:
  • 2008

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Abstract

We present a reduction from the problem of colouring the vertices of the graph to the maximum independent set problem (MISP) showing that for an n-vertex graph G the sum of the chromatic number of G and the independence number of a graph derived from the complement of G is equal to n. We investigate the applicability of the MISP greedy algorithm to the graph colouring problem. We prove that the well-known Leighton RLF algorithm and an algorithm obtained by modifying the MISP greedy heuristic behave in exactly the same way.