(1) Department of Mathematics, South China Normal University, Guangzhou, Guangdong 510631, China
Abstract:
In this paper,we study
block-separating congruences on E-bisimple semigroups. We describe
two congruence relations T and W on the
lattice of block-separating congruences, where the latter is
defined in this paper. We determine the greatest and smallest
congruences in T-classes and W-classes.