The monoid of ordered partitions of a natural number.
The monoid of strong endomorphisms of a graph.
The monomorphism semigroup of S(X).
The partially ordered collection of regular ...-classes of S(X).
The pseudovariety of semigroups of triangular matrices over a finite field
We show that semigroups representable by triangular matrices over a fixed finite field form a decidable pseudovariety and provide a finite pseudoidentity basis for it.
The pseudovariety of semigroups of triangular matrices over a finite field
We show that semigroups representable by triangular matrices over a fixed finite field form a decidable pseudovariety and provide a finite pseudoidentity basis for it.
The range order of a product of i transformations from a finite full transformation semigroup.
The Schur Theorem for periodic semigroups of Linear relations.
The semigroup of a strongly connected automaton.
The semigroup of fully indecomposable relations and Hall relations
The structure of the automorphism group of a Croisot-Tessier semigroup.
The structure of the centralizer of a permutation.
The translational hull of a normal cryptogroup
The translational hull of a subsemigroup of a semilattice of groups.
Towards a classification of maximal unicellular bands.
Transformation semigroup diagram and the ...-relation.
Transformation semigroups associated to Γ-semigroups
The concept of Γ-semigroups is a generalization of semigroups. In this paper, we associate two transformation semigroups to a Γ-semigroup and we call them the left and right transformation semigroups. We prove some relationships between the ideals of a Γ-semigroup and the ideals of its left and right transformation semigroups. Finally, we study some relationships between Green's equivalence relations of a Γ-semigroup and its left (right) transformation semigroup.
Transformations determining uniquely a monoid
Transformations determining uniquely a monoid. II.
Transformations determining uniquely a monoid. III: Weak determinancy