Subdirectly irreducible groupoids in some varieties
Subdirectly irreducible non-idempotent left symmetric left distributive groupoids
We study groupoids satisfying the identities x·xy = y and x·yz = xy·xz. Particularly, we focus our attention at subdirectlyirreducible ones, find a description and charecterize small ones.
Subdirectly irreducible semilattices with an automorphism.
Subdirectly Irreducibles in some Varieties of Algebras having the Semilattice Structure
Subdirekte Produkte und konjunkte Summen.
Subdirekte Produkte vollständiger Verbände.
Super-De Morgan functions and free De Morgan quasilattices
A De Morgan quasilattice is an algebra satisfying hyperidentities of the variety of De Morgan algebras (lattices). In this paper we give a functional representation of the free n-generated De Morgan quasilattice with two binary and one unary operations. Namely, we define the concept of super-De Morgan function and prove that the free De Morgan quasilattice with two binary and one unary operations on nfree generators is isomorphic to the De Morgan quasilattice of super-De Morgan functions of nvariables....
Suprema of Classes of Generalized Scrimger Varieties of Lattice Ordered Groups.
Sur la construction de certaines MS-algèbres
Sur quelques problèmes de plongement en algèbre
Sur quelques problèmes de plongements en algèbre
Symmetry classes of tensors via semigroup operands.
Système déterminant de l'algèbre de Morgan libre sur un ensemble ordonné fini