1.Department of Mathematics,Tabriz University,Tabriz,Iran;2.Research Center for Industrial Mathematics of University of Tabriz,Tabriz,Iran
Abstract:
Let S be an inverse semigroup. In Rezavand et al. (Semigroup Forum 77:300–305, 2008) and Munn (Proc. Glasgow Math. Assoc. 5:41–48, 1961) two equivalence relations are defined on S. After describing these relations we show that they coincide.