Regular *-Congruence Pairs on a Quasi Regular *-Semigroup*

摘要

In this paper, the regular *-congruence pairs on a quasi regular *-semigroup are investigated in terms of their projection kernels and projection traces. As a conse quence, some results obtained by Imaoka in 1984 concerning *-congruences on a regular *-semigroup are extended and generalized.