Proper left type- covers.
Properties of a pair of functions which generate a dense subsemigroup of S(X).
Properties of congruences on commutative monoids.
Properties of the subsemigroups of the bicyclic monoid
In this paper we study some properties of the subsemigroups of the bicyclic monoid B, by using a recent description of its subsemigroups. We start by giving necessary and sufficient conditions for a subsemigroup to be finitely generated. Then we show that all finitely generated subsemigroups are automatic and finitely presented. Finally we prove that a subsemigroup of B is residually finite if and only if it does not contain a copy of B.
Propriétés des demi-groupes de fractions
Propriétés des demi-groupes de fractions
Prüfer and Dedekind monoids.
PRÜFER AND DEDEKIND MONOIDS II.
Prüfer -groups
Průměr grafu pologrupy
Průměr grafu systému vlastních podpologrup komutativní pologrupy
Pseudosimple Commutative Semigroups.
Pseudo-symmetric ideals of semigroup and their radicals
Pseudovarieties of completely regular semigroups.
P-systems in regular semigroups.
Purity in the category of M-sets.
Push-outs and strict projective limits of semilattices.
semigroups.
Qr-semigroups
Quasetrivial and nearly quasitrivial distributive goupoids and semigroups