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 …

1. Introduction. The purpose of this essay “is to highlight the connec-tions and interplay
between the concepts of epimorphisms, dominions and amalgams. This will be done largely …

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 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 semigroup satisfying a heterotypical identity of which at least one side has
no repeated variable is saturated and find sufficient conditions on a homotypical identity …

Completely Semisimple Semigroups and Epimorphisms Page 1 PROCEEDINGS OF THE
AMERICAN MATHEMATICAL SOCIETY Volume 96, Number 3, March 1986 COMPLETELY …

Various semigroups of noninvertible supermatrices of the special (antitriangle) shape having
nilpotent Berezinian which appear in supersymmetric theories are defined and investigated …

The thesis is devoted to abstract, geometric and symmetric aspects of modern elementary
particle theories. A new direction in constructing supersymmetric and superstring models …