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arXiv · 1309.5629

Groups having complete bipartite divisor graphs for their conjugacy class sizes

Roghayeh Hafezieh·Pablo Spiga
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Abstract

Given a finite group G, the bipartite divisor graph for its conjugacy class sizes is the bipartite graph with bipartition consisting of the set of conjugacy class sizes of G-Z (where Z denotes the centre of G) and the set of prime numbers that divide these conjugacy class sizes, and with {p,n} being an edge if gcd(p,n)\neq 1. In this paper we construct infinitely many groups whose bipartite divisor graph for their conjugacy class sizes is the complete bipartite graph K_{2,5}, giving a solution to a question of Taeri.

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Roghayeh Hafezieh, Pablo Spiga. 2013-09-22. Groups having complete bipartite divisor graphs for their conjugacy class sizes. https://arxiv.org/abs/1309.5629

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