Principal tolerances on lattices
Products of multialgebras and their fundamental algebras.
Produit symétrisé
Proper hypersubstitutions of some generalizations of lattices and Boolean algebras
Properties of relatively pseudocomplemented directoids
The concept of a relatively pseudocomplemented directoid was introduced recently by the first author. It was shown that the class of relatively pseudocomplemented directoids forms a variety whose axiom system contains seven identities. The aim of this paper is three-fold. First we show that these identities are not independent and their independent subset is presented. Second, we modify the adjointness property known for relatively pseudocomplemented semilattices in the way which is suitable for...
Proprietà metamatematiche di alcune classi di algebre
Propriétés catégorielles dans la théorie des algèbres universelles
Propriétés de permanence et existence de réalisations minimales pour les algèbres multisortes
Pseudogroupoids and commutators.
Pseudovarieties of completely regular semigroups.