Volume no :2, Issue no: 2, May 2009

ON THE IDENTIFICATION OF SUBSEMIGROUPS OF TRANSFORMATION SEMIGROUPS

Author's: H. Doostie and A. Sadeghieh
Pages: [245] - [256]
Received Date: November 10, 2008
Submitted by:

Abstract

A semigroup S is called commuting regular if for all there exists an element such that This paper investigates all of the non-abelian commuting regular inverse subsemigroups of the full transformation semigroups and and determines all of them up to isomorphisms. Moreover, the notion of commutativity degree of a finite group will be generalized for the semigroups and it will be calculated for the studied subsemigroups. This study gives a necessary and sufficient condition for a commuting regular inverse semigroup to be a group.

Keywords

commuting regularity, transformation semigroups, inverse semigroup, completely regular semigroups.