On -fold fuzzy positive implicative ideals of BCK-algebras.
On -fold implicative filters of lattice implication algebras.
On n × m-valued Łukasiewicz-Moisil algebras
n×m-valued Łukasiewicz algebras with negation were introduced and investigated in [20, 22, 23]. These algebras constitute a non trivial generalization of n-valued Łukasiewicz-Moisil algebras and in what follows, we shall call them n×m-valued Łukasiewicz-Moisil algebras (or LM n×m -algebras). In this paper, the study of this new class of algebras is continued. More precisely, a topological duality for these algebras is described and a characterization of LM n×m -congruences in terms of special subsets...
On naturally ordered semigroups.
On necessary conditions of optimality in linear spaces
On n-normal posets
A poset Q is called n-normal, if its every prime ideal contains at most n minimal prime ideals. In this paper, using the prime ideal theorem for finite ideal distributive posets, some properties and characterizations of n-normal posets are obtained.
On normal and strongly normal lattices.
On normal lattices and Wallman spaces.
On normality relation and its generalization on lattices
On -ideals of groups of divisibility
On -modular and -distributive semilattices
On order and betweenness compatibility.
On order and geodesic alignment of a connected bigraph
On order and morphisms related to a Sheffer stroke.
This paper deals with a new interpretation of a special functional characterisation of Sheffer strokes, with the study of morphisms and the construction of different De Morgan Algebras on a given set.
On orderability of some classes of groupoids.
On orderability of topological groups.
On ordered division rings
Prestel introduced a generalization of the notion of an ordering of a field, which is called a semiordering. Prestel's axioms for a semiordered field differ from the usual (Artin-Schreier) postulates in requiring only the closedness of the domain of positivity under x ↦ xa² for non-zero a, in place of requiring that positive elements have a positive product. Our aim in this work is to study this type of ordering in the case of a division ring. We show that it actually behaves just as in the commutative...
On ordered division rings
Prestel introduced a generalization of the notion of an ordering of a field, which is called a semiordering. Prestel’s axioms for a semiordered field differ from the usual (Artin-Schreier) postulates in requiring only the closedness of the domain of positivity under for nonzero , instead of requiring that positive elements have a positive product. In this work, this type of ordering is studied in the case of a division ring. It is shown that it actually behaves the same as in the commutative...
On ordered filters of implicative semigroups.
On ordered left groups.