A fast algorithm for equitable coloring

  • Authors:
  • Henry A. Kierstead;Alexandr V. Kostochka;Marcelo Mydlarz;Endre Szemerédi

  • Affiliations:
  • Arizona State University, School of Mathematical and Statistical Sciences, P.O. Box 871804, 85287, Tempe, AZ, USA;University of Illinois, Department of Mathematics, 1409 W. Green St., 61801, Urbana, IL, USA and Sobolev Institute of Mathematics, Novosibirsk, 630090, Russia;Yahoo! Research Latin America, Blanco Encalada 2120, 4h floor, Santiago, Chile;Rutgers University, Department of Computer Science, 110 Frelinghuysen Rd., 08854-8019, Piscataway, NJ, USA

  • Venue:
  • Combinatorica
  • Year:
  • 2010

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Abstract

A proper vertex coloring of a graph is equitable if the sizes of color classes differ by at most one. The celebrated Hajnal-Szemerédi Theorem states: For every positive integer r, every graph with maximum degree at most r has an equitable coloring with r+1 colors. We show that this coloring can be obtained in O(rn 2) time, where n is the number of vertices.