The congruence extension property for algebraic semigroups.
The construction of semigroups from groups and semilattices
THE DIRECT SUM OF SEMIGROUPS IS OF INNER TYPE
The dual ordinal of a bisimple inverse semigroup.
The Embedding of an Ordered Semigroup in an Ordered group via the Quotient Condition
The existence and structure of IRR(X).
The exponent semigroup of a semigroup satisfying (XY)3 = x3 Y3.
The factorizable transformation semigroups.
The finiteness of a base of indentities for fiveelement monoids
The free completely regular semigroup on a set.
The fundamental representation of a completely regular semigroup.
The fundamental representation of a regular semigroup.
The generalized translational hull of a semigroup.
The greatest Archimedean ideal in a semigroup
The greatest idempotent separating congruence on an ....-unipotent semigroup.
The groupoid of varieties of idempotent semigroups.
The ideal structure of -semigroups
The injective hull of S-sets, S a semilattice of groups.
The intersection of free submonoids of a free monoid is free.
The inverse semigroup of partial symmetries of a convex polygon.