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IMI/Publicaţii/CSJM/Ediţii/CSJM v.22, n.1 (64), 2014/

Chromatic Polynomials Of Some (m,l) - Hyperwheels

Authors: J. A. Allagan
Keywords: chromatic polynomial, hyperfan, hyperwheel, Stirling numbers.

Abstract

In this paper, using a standard method of computing the chromatic polynomial of hypergraphs, we introduce a new reduction theorem which allows us to find explicit formulae for the chromatic polynomials of some (complete) non-uniform (m, l)− hyperwheels and non-uniform (m, l)−hyperfans. These hypergraphs, constructed through a “join” graph operation, are some generalizations of the well-known wheel and fan graphs, respectively. Further, we revisit some results concerning these graphs and present their chromatic polynomials in a standard form that involves the Stirling numbers of the second kind.

niversity of North Georgia, Watkinsville, GA, United States.
Department of Mathematics
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