In semigroup theory there are certain kinds of band decompositions,
which are very useful in the study of the structure semigroups. There
are a number of special semigroup classes in which these decompositions
can be used very successfully. The book focuses attention on such
classes of semigroups. Some of them are partially discussed in earlier
books, but in the last thirty years new semigroup classes have appeared
and a fairly large body of material has been published on them. The book
provides a systematic review on this subject. The first chapter is an
introduction. The remaining chapters are devoted to special semigroup
classes. These are Putcha semigroups, commutative semigroups, weakly
commutative semigroups, R-Commutative semigroups, conditionally
commutative semigroups, RC-commutative semigroups, quasi commutative
semigroups, medial semigroups, right commutative semigroups, externally
commutative semigroups, E-m semigroups, WE-m semigroups, weakly
exponential semigroups, (m, n)-commutative semigroups and
n(2)-permutable semigroups.
Audience: Students and researchers working in algebra and computer
science.