On -semigroups
On maximal compact subsemigroups of the endomorphism semigroup of an n-dimensional complex vector space.
On maximal ideals of compact connected topological semigroups.
On maximal submonoids of BX.
On maximal subsemigroups of Baer-Levi semigroups.
On medial local semigroups.
On middle units in orthodox semigroups.
On minimal A-ideals of semigroups.
On minimal ideals in semigroups with respect to their subsets. II.
On minimal ideals in semigroups with respect to their subsets. I.
In the paper, the following concept are defined: (i) a minimal left (right, two-sided) ideal with respect to a subset of a semigroup , (ii) a kernel with respect to a subset of a semigroup , and their basic properties are investigated.
On modular elements of the lattice of semigroup varieties
A semigroup variety is called modular if it is a modular element of the lattice of all semigroup varieties. We obtain a strong necessary condition for a semigroup variety to be modular. In particular, we prove that every modular nil-variety may be given by 0-reduced identities and substitutive identities only. (An identity is called substitutive if the words and depend on the same letters and may be obtained from by renaming of letters.) We completely determine all commutative modular...
On monoids over which all strongly flat cyclic right acts are projective.
On M-Varieties generated by Power Monoids.
On -regular semigroups
On naturally ordered semigroups.
On nets of free polygons over a category and their categories of homomorphisms
On Nilpotent Subsemigroups in some Matrix Semigroups
2000 Mathematics Subject Classification: 20M20, 20M10.We describe maximal nilpotent subsemigroups of a given nilpotency class in the semigroup Ωn of all n × n real matrices with non-negative coefficients and the semigroup Dn of all doubly stochastic real matrices.
On normal semigroups
On numerical semigroups.
On one definition of grammatical categories