On generalized conditionally commutative semigroups
On generalized kernels.
On generalized kernels II.
On generating regular elements in the semigroup of binary relations.
On graph products of automatic monoids
The graph product is an operator mixing direct and free products. It is already known that free products and direct products of automatic monoids are automatic. The main aim of this paper is to prove that graph products of automatic monoids of finite geometric type are still automatic. A similar result for prefix-automatic monoids is established.
On graph products of automatic monoids
The graph product is an operator mixing direct and free products. It is already known that free products and direct products of automatic monoids are automatic. The main aim of this paper is to prove that graph products of automatic monoids of finite geometric type are still automatic. A similar result for prefix-automatic monoids is established.
On groups of units in a special class of monoids.
On ideal extensions of completely simple semigroups.
On ideals of a semilattice
On idempotent semifields and a paper by H. Hutchins.
On injective and flat commutative regular semigroups.
On intra-regular semigroups
On irreducible matrix semigroups.
On Kim's conjecture.
On la-semigroup defined by a commutative inverse semigroup
On lattice ordered periodic semigroups
On lattices embeddable into subsemigroup lattices. III: Nilpotent semigroups.
On left --liberal semigroups
In this paper the equivalence on a semigroup in terms of a set of idempotents in is defined. A semigroup is called a -liberal semigroup with as the set of projections and denoted by if every -class in it contains an element in . A class of -liberal semigroups is characterized and some special cases are considered.
On left canellative semigroups.
On left, right and two-sided cancellable elements of semigroups.