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REALIZABILITY PROBLEM FOR COMMUTING GRAPHS
Published online by Cambridge University Press: 13 May 2016
Abstract
We investigate properties which ensure that a given finite graph is the commuting graph of a group or semigroup. We show that all graphs on at least two vertices such that no vertex is adjacent to all other vertices is the commuting graph of some semigroup. Moreover, we obtain complete classifications of the graphs with an isolated vertex or edge that are the commuting graph of a group and the cycles that are the commuting graph of a centrefree semigroup.
MSC classification
- Type
- Research Article
- Information
- Journal of the Australian Mathematical Society , Volume 101 , Issue 3 , December 2016 , pp. 335 - 355
- Copyright
- © 2016 Australian Mathematical Publishing Association Inc.
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