Powers of subsets in a finite semigroup.
Poznámka k maximálnym ()-ideálom v pologrupách
Poznámka o -triedách v komutatívných Hausdorffových bikompaktních pologrupách
Poznámka o faktorových pologrupách danej pologrupy
Precomplete varieties of semigroups.
P-regular semigroups.
(Pre)order preserving additive homomorphisms of (pre)ordered commutative semigroups into real numbers
Présentation et simplifiabilité de certains monoïdes
Presentation of the singular part of the Brauer monoid
We obtain a presentation for the singular part of the Brauer monoid with respect to an irreducible system of generators consisting of idempotents. As an application of this result we get a new construction of the symmetric group via connected sequences of subsets. Another application describes the lengths of elements in the singular part of the Brauer monoid with respect to the system of generators mentioned above.
Presentations et presentations simplifiables d'un monoide simplifiable.
Presentations for subsemigroups of
Let be an -chain. We give presentations for the following transformation semigroups: the semigroup of full order-decreasing mappings of , the semigroup of partial one-to-one order-decreasing mappings of , the semigroup of full order-preserving and order-decreasing mappings of , the semigroup of partial one-to-one order-preserving and order-decreasing mappings of , and the semigroup of partial order-preserving and order-decreasing mappings of .
Presentations of alternating semigroups.
Pre-solid varieties of semigroups
Pre-hyperidentities generalize the concept of a hyperidentity. A variety is said to be pre-solid if every identity in is a pre-hyperidentity. Every solid variety is pre-solid. We consider pre-solid varieties of semigroups which are not solid, determine the smallest and the largest of them, and some elements in this interval.
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...
Primární rozklady
Primary factorization in semigroups
Primary ideals in semigroups.
Primary semigroups.
Prime elements in the semigroup of finite types of partially ordered sets in cardinal multiplication
Prime ideals and maximal ideals in semigroups