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Paper   IPM / Computer Science / 10833
School of Computer Science
  Title:   New bounds for the chromatic number of graphs
  Author(s):  M. Zaker
  Status:   Published
  Journal: Journal of Graph Theory
  No.:  2
  Vol.:  58
  Year:  2008
  Pages:   110-122
  Publisher(s):   John Wiley & Sons
  Supported by:  IPM
  Abstract:
In this article we first give an upper bound for the chromatic number of a graph in terms of its degrees. This bound generalizes and modifies the bound given in [11]. Next, we obtain an upper bound of the order of magnitude O(n1−ϵ) for the coloring number of a graph with small K2,t (as subgraph), where n is the order of the graph. Finally, we give some bounds for chromatic number in terms of girth and book size. These bounds improve the best known bound, in terms of order and girth, for the chromatic number of a graph when its girth is an even integer.

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