This book is an indispensable source for anyone with an interest in semigroup theory or
whose research overlaps with this increasingly important and active field of mathematics. It …

This book introduces recently developed ideas and techniques in semigroup theory to
provide a handy reference guide previously unavailable in a single volume. The opening …

We establish a necessary condition (E) for a semigroup variety to be closed under the taking
of epimorphisms and a necessary condition (S) for a variety to consist entirely of saturated …

The aim of this paper is to determine several saturated classes of structurally regular
semigroups. First, we show that structurally (n, m)-regular semigroups are saturated in a …

The complete characterization of saturated varieties of semigroups remains an unsolved
problem. The primary objective of this paper is to make significant progress in this direction …

A semigroup with an epimorphically embedded subband Page 1 BULL. AUSTRAL. MATH.
SOC. 20M05, 20M07 VOL. 27 (1983), 231-242. A SEMIGROUP WITH AN EPIMORPHICALLY …

In this paper, we discussed some saturated classes of ℋ‐commutative semigroups, left
(right) regular semigroups, medial semigroups, and paramedial semigroups. The results of …

In this paper we study epimorphisms, dominions and related properties for some classes of
structurally (n, m)-regular semigroups for any pair (n, m) of positive integers. In Section 2 …

In Chapter h we determine all saturated varieties of commutative semigroups in a joint
theorem with NM Khan. They are the varieties admitting a non-trivial identity for which at …

We show that a permutative variety of posemigroups satisfying a permutation identity x_1x_2
⋯ x_n= x_ i_1 x_ i_2 ⋯ x_ i_n x 1 x 2⋯ xn= xi 1 xi 2⋯ xin with i_1 ≠ 1~ and~ i_ n-1 ≠ n-1 …