On the structure of (m,n)-commutative semigroups.
On the type sequences of some one dimensional rings.
On two papers of B.M. Schein.
On -semigroups
One element extensions of commutative semigroups
Perfectness of certain subsemigroups of a perfect semigroup.
Periodic properties of groupbound semigroups.
Permutable groupoids
Permutation functions and (n,m)-commutativity of semigroups .
Point-Transitive Actions by Certain Abelian Real Clans.
Point-Transitive Actions by Certain Abelian Real Clans. (Short Communication).
Polynomial growth of sumsets in abelian semigroups
Let be an abelian semigroup, and a finite subset of . The sumset consists of all sums of elements of , with repetitions allowed. Let denote the cardinality of . Elementary lattice point arguments are used to prove that an arbitrary abelian semigroup has polynomial growth, that is, there exists a polynomial such that for all sufficiently large . Lattice point counting is also used to prove that sumsets of the form have multivariate polynomial growth.
Positive definite functions on discrete commutative semigroups.
Positive-definite functions on discrete commutative semigroups: Errata and supplements.
Power cancellative semigroups.
Poznámka o -triedách v komutatívných Hausdorffových bikompaktních pologrupách
(Pre)order preserving additive homomorphisms of (pre)ordered commutative semigroups into real numbers
Pre-strongly solid varieties of commutative semigroups
Generalized hypersubstitutions are mappings from the set of all fundamental operations into the set of all terms of the same language do not necessarily preserve the arities. Strong hyperidentities are identities which are closed under the generalized hypersubstitutions and a strongly solid variety is a variety which every its identity is a strong hyperidentity. In this paper we give an example of pre-strongly solid varieties of commutative semigroups and determine the least and the greatest pre-strongly...
Primary factorization in semigroups
Prime elements in the semigroup of finite types of partially ordered sets in cardinal multiplication