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
Transformations determining uniquely a monoid. IV: Weak determinancy
Translational hulls and block designs.
Translations of commutative unique factorization semigroups.
TX is absolutely closed.
Über die Vollständigkeit induktiver Gruppoide, die zu einer speziellen Klasse endlicher Ringe gehören
Über einge Eigenschaften der Kommutatoren der symmetrischen Halbgruppe.
Ueber die Zyklisch-inversen Unterhalbgruppen der Symmetrischen Halbgruppe tx
Une representation fidèle des groupes d'un monoïde de relations binaires sur un ensemble fini.
Une topolgie du monoide libre.
Uniformly quasiregular semigroups in two dimensions.
Unifying congruences on S(I).
Union preserving homomorphisms of semigroups of closed relations.
Unique prime factorization in a partial semigroup of matrix-polynomials
We establish a unique factorization result into irreducibel elements in the partial semigroup of 2 × 2-matrices with entries in K[x] whose determinant is equal to 1, where K is a field, and where multiplication is defined as the usual matrix-multiplication if the degrees of the factors add up. This investigation is motivated by a result on matrices of entire functions.