Periodic weakly-cancellative semigroups.
Permutability of congruences on commutative semigroups.
Permutability of normal extensions of a semilattice.
Permutable duo semigroups.
Permutable groupoids
Permutable transformation semigroups.
Permutation functions and (n,m)-commutativity of semigroups .
Permutation group extension of groupoids.
Permutation properties and the Fibonacci semigroup.
Plus grand groupe image homomorphe et isotone d'un monoïde ordonné : caractérisations des anneaux «clos»
Points de continuité à gauche d'une action de semi-groupe.
Point-Transitive Actions by Certain Abelian Real Clans.
Point-Transitive Actions by Certain Abelian Real Clans. (Short Communication).
Polars and X-ideals in semigroups
Pologrupy, v ktorých každý ľavý vlastný ideál je grupou
Polynomial functions over commutative semigroups.
Polynomial functions over monoids.
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 Abelian semigroups
Positive definite functions on discrete commutative semigroups.