O ()-ideáloch direktného súčinu pologrúp
O pologrupách, ktorých každý ľavý hlavný ideál obsahuje jednotku
On 0-Minimal (0, 2)-Bi-Ideals Of Semigroups
On 0-Minimal Bi-Ideals Of Semigroups
On 0-minimal bi-ideals of semigroups.
On a problem of n(2)-permutable semigroups.
On bases and maximal ideals in semigroups
On commutative subideal series of semigroups.
On complete -ideals in semigroups
On completely regular semigroups.
On dedekind monoids.
On Dual Semigroups
On free subsemigroups.
On fuzzy points in semigroups.
On ideals in regular ternary semigroups
In this paper we study some interesting properties of regular ternary semigroups, completely regular ternary semigroups, intra-regular ternary semigroups and characterize them by using various ideals of ternary semigroups.
On ideals of implicative semigroups.
On left, right and two-sided cancellable elements of semigroups.
On -semigroups
On minimal A-ideals of semigroups.
On minimal ideals in semigroups with respect to their subsets. II.