On -operators in an arbitrary semigroup
On -ideals and generalized -ideals in semigroups
One-sided -ideals and -ideals in semirings.
One-sided principal ideals in the direct product of two semigroups
A necessary and sufficient condition is given for a) a principal left ideal in to be equal to the direct product of the corresponding principal left ideals , b) an -class to be equal to the direct product of the corresponding -classes .
Order theoretic variants of the fundamental theorem of compact semigroups.
Ordered semigroups containing minimal and maximal elements.
Ordering D-classes and computing Schein rank is hard.
Partially simple semigroups
Perfect monoids.
Permutation group extension of groupoids.
Pologrupy, v ktorých každý ľavý vlastný ideál je grupou
Polynomial functions over monoids.
Poznámka k maximálnym ()-ideálom v pologrupách
Primární rozklady
Primary factorization in semigroups
Primary ideals in semigroups.
Prime ideals and maximal ideals in semigroups
Principal ideals in the semigroup of binary relations on a finite set: What happens when one element is added to the set.
Principal ideals of finitely generated commutative monoids
We study the semigroups isomorphic to principal ideals of finitely generated commutative monoids. We define the concept of finite presentation for this kind of semigroups. Furthermore, we show how to obtain information on these semigroups from their presentations.
Principal two-sided ideals in the direct product of two semigroups