Structure of regular semigroups II: the general case.
Structure of regular semigroups with a quasi-ideal inverse transversal.
Structure theorems for regular semigroups.
Structure theorems on certain regular and inverse semigroups
Structures algébriques multivoques. Applications
Structures naturelles des demi-groupes et des anneaux réguliers ou involutés
Certaines relations binaires sont définies sur les demi-groupes et les demi-groupes à involution. On examine comment elles peuvent en ordonner les éléments: notamment les idempotents, les éléments réguliers au sens de von Neumann, ceux qui possédent un inverse ponctuel ou de Moore-Penrose ; et en fonction aussi de conditions sur l'involution. Ces relations peuvent alors coïncider avec les ordres naturels des idempotents et des demi-groupes inverses, avec les ordres de Drazin et de Hartwig : elles...
Sturdy bands of semigroups.
In this paper we consider band compositions determined by two transitive systems of monomorphisms, called the sturdy bands of semigroups.
Sturdy frames of type (2,2) algebras and their applications to semirings
We introduce sturdy frames of type (2,2) algebras, which are a common generalization of sturdy semilattices of semigroups and of distributive lattices of rings in the theory of semirings. By using sturdy frames, we are able to characterize some semirings. In particular, some results on semirings recently obtained by Bandelt, Petrich and Ghosh can be extended and generalized.
Sturmian morphisms. (Morphismes de Sturm.)
Subalgebra lattices of completely simple semigroups.
Subalgebra modular, distributive and boolean varieties of semigroups
Subdirect decompositions of finite commutative semigroups.
Subdirect decompositions of finitely generated commutative semigroups.
Subdirect products of a band and a semigroup.
Subdirect products of regular seimgroups.
Subdirectly irreducible completely symmetrical semigroups.
Subdirectly irreducible H-semigroups.
Subdirectly irreducible right commutative semigroups.
Subgroups of free idempotent generated regular semigroups.
Subprincipal closed ideals in ßN.