Semigroups and their applications : proceedings of the International Conference "Algebraic Theory of Semigroups and Its Applications" held at the California State University, Chico, April 10-12, 1986

Implicit operations on certain classes of semigroups.- Finite idempotent-commuting semigroups.- Finite semigroups whose idempotents commute or form a subsemigroup.- Inverse semigroups with countable universal semilattices.- The identity element in inverse semigroup algebras.- Free bands and free *-bands.- Finite inverse semigroups and amalgamation.- Rank properties in semigroups of mappings.- Inverse semigroups whose lattices of full inverse subsemigroups are modular.- Basis properties, exchange properties and embeddings in idempotent-free semigroups.- Lattices of torsion theories for semi-automata.- The countability indices of certain transformation semigroups.- Some decision problems for inverse monoid presentations.- A class of inverse semigroup algebras.- Categorical extension theory - revisited.- A class of uniform chains.- Cayley theorems for semigroups.- Power semigroups and related varieties of finite semigroups.- On the lattice of varieties of completely regular semigroups.- New techniques in global semigroup theory.- Finite J-trivial monoids and partially ordered monoids.- On the recent results in the study of power semigroups.- Type II redux.