On rich monoids
On right congruences associated with the input semigroup S of automata.
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 Schützenberger monoids in transformation semigroups.
On self-injective semigroups satisfying the minimal conditions.
On semidirect and two-sided semidirect products of finite trivial monoids
On semidirect products of two finite semilattices.
On semifir monoid rings.
We give a new condition on a monoid M for the monoid ring F[M] to be a 2-fir. Furthermore, we construct a monoid M that satisfies all the currently known necessary conditions for F[M] to be a semifir and that the group of units of M is trivial, but M is not a directed union of free monoids.
On semigroup algebras satysfying polynomial identities.
On semigroup graded PI-algebras.
On semigroup rings.
On semigroup's admitting ring structure.
On semigroups admitting ring structure.
On semigroups admitting ring structure II.
On semigroups admitting ring structure III
On semigroups and uniform partial bands.
On Semigroups Defined by the Identity xxy = y