Power graphs of a class of completely 0-simple semigroups

Abstract

We first determine the structure of the power digraphs of completely 0-simple semigroups, and then some properties of their power graphs are given. As the main result in this paper, using Cameron and Ghosh’s theorem about power graphs of abelian groups, we obtain a characterization that two \(G^{0}\)-normal completely 0-simple orthodox semigroups S and T with abelian group \(\mathcal {H}\)-classes are isomorphic based on their power graphs. We also present an algorithm to determine that S and T are isomorphic or not.