Structure of the set of compatible proximities when the set is finite
Structure spaces of lattices
Studies of some items of the lattice theory in relation to the Hilbert-Hermite space
Su una classe di gruppi con molti sottogruppi quasinormali
Subalgebra lattices of unary algebras and an axiom of choice
Subdirect decomposition of distributive quasilattices
Subdirect decompositions of algebras from 2-clone extensions of varieties
Let τ:F → ℕ be a type of algebras, where F is a set of fundamental operation symbols and ℕ is the set of nonnegative integers. We assume that |F|≥2 and 0 ∉ (F). For a term φ of type τ we denote by F(φ) the set of fundamental operation symbols from F occurring in φ. An identity φ ≉ ψ of type τ is called clone compatible if φ and ψ are the same variable or F(φ)=F(ψ)≠. For a variety V of type τ we denote by the variety of type τ defined by all identities φ ≉ ψ from Id(V) which are either clone compatible...
Subdirectly irreducible and congruence distributive -lattices
Subdirekte Produkte vollständiger Verbände.
Sublattices of Euclidean spaces.
Sublattices of topologically represented lattices.
Sublattices with saturated chains
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 la fusion des contextes individuels
Sur une nouvelle génération de la notion de treillis. Les supertreillis et certaines de leurs propriétés générales
Sur une opérade ternaire liée aux treillis de Tamari
On introduit une opérade anticyclique définie par une présentation ternaire quadratique. On montre qu’elle admet une base indexée par les arbres binaires planaires. On relie cette construction à la famille des treillis de Tamari en construisant un isomorphisme entre et le groupe de Grothendieck de la catégorie qui envoie la base de sur les classes des modules projectifs et qui transforme la structure anticyclique de en la transformation de Coxeter de la catégorie dérivée de . La dualité...
S-verklebte Summen von Verbänden.
Symmetric embedding of finite lattices into finite partition lattices