On representation of commutative semigroups.
On right congruences of semigroups.
On right normal right inverse semigroups.
On right self-injective regular semigroups.
On sandwich sets and congruences on regular semigroups
Let be a regular semigroup and be the set of its idempotents. We call the sets and one-sided sandwich sets and characterize them abstractly where . For such that , , we call the sandwich set of . We characterize regular semigroups in which all (or all are right zero semigroups (respectively are trivial) in several ways including weak versions of compatibility of the natural order. For every , we also define as the set of all idempotets such that, for any congruence on...
On self-injective semigroups satisfying the minimal conditions.
On semidirect products of two finite semilattices.
On semigroup graded PI-algebras.
On semigroups admitting ring structure II.
On semigroups and uniform partial bands.
On semigroups having a kernel
On semigroups of left inner type.
On semigroups that are semilattices of left groups
On semigroups which are not divided by any non-trivial semigroup with an identity.
On semigroups with minimal or maximal condition on left congruences.
On semigroups with the idealizer condition.
On semigroups with T-ideals
On semilattices of groups whose arrows are epimorphisms.
On semisimple bands.
On separation properties in semilattices.