A (3,1)*-choosable theorem on toroidal graphs

  • Authors:
  • Li Zhang

  • Affiliations:
  • -

  • Venue:
  • Discrete Applied Mathematics
  • Year:
  • 2012

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Abstract

An (L,d)^*-coloring is a mapping @f that assigns a color @f(v)@?L(v) to each vertex v@?V(G) such that at most d neighbors of v receive color @f(v). A graph G is called (k,d)^*-choosable if it admits an (L,d)^*-coloring for every list assignment L with |L(v)|=k for all v@?V(G). Let G be a graph embeddable on the torus. In this paper, it is proved that G is (3,1)^*-choosable if G contains no 5- and 6-cycles.