Some applications for the number of conjugacy classes and centralizers of a finite p-group

Document Type : Original Article

Author

, Department of Mathematics,,Technical and Vocational University (TVU),Tehran, Iran.

10.48301/kssa.2022.340303.2087

Abstract

Let G be a finite non-abelian metacyclic p-group (p is an odd prime number) and Z(G) be its center‎. ‎The non-commuting graph delta(G) of the group G is defined as the graph‎, ‎whose vertex set is and two distinct vertices u and v are connected by an edge if and only if the commutator of u and v is not the identity‎. ‎In this paper‎, ‎the exact number of conjugacy classes of G is obtained‎, ‎then the various properties of the non-commuting graph of the group are given‎. ‎Moreover‎, ‎the number of edges‎, ‎vertices‎, ‎the completeness and the connection of the graph are examined‎. ‎In particular‎, ‎we prove that the click number and the chromatic number of these graphs are the same‎. ‎In addition‎, ‎the centralizers of the group are computed‎. ‎Also‎, ‎exact formulas for the centralizer sizes of G are obtained and using these results‎, ‎the n-th commutativity degrees of such groups in terms of their parameters are computed‎.

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Articles in Press, Accepted Manuscript
Available Online from 17 September 2022
  • Receive Date: 09 May 2022
  • Revise Date: 26 June 2022
  • Accept Date: 11 September 2022