$\tau$-Group Congruences on E-Inversive $\tau$-Semigroups

Supavinee Sattayaporn

Abstract

In this paper, we give a characterization and some properties of E-inversive $\tau$-semigroup. Moveover, we also introduce a $\tau$-group congruence on any E-inversive $\tau$-semigroup and give its characterizations. Our main results improve and extend many results obtained by Seth [1].