On the Chinese remainder theorem of H. Draškovičová
On the congruence extension property.
On the congruence extension property for compact semigroups.
On the congruence lattice of stable algebras with definability of compact congruences
On the conversion of binary algebras into semi-primal algebras
On the degrees of permutability of subregular varieties
On the direct power of relational systems
On the dual space of an MS-algebra.
On the embedding of ...-algebras in groupoids.
On the existence of non-trivial tolerances in permutable algebras
On the failure of Birkhoff's theorem for locally small based equational categories of algebras
On the finite basis property for semigroup varieties.
On the greatest congruence relation contained in an equivalence relation and its applications to the algebraic theory of machines
On the homology theory of categories. I.
On the homology theory of categories. II.
On the join of equational classes of idempotent algebras and algebras with constants
On the lattice of completely regular monoid varieties.
On the lattice of congruences on inverse semirings
Let S be a semiring whose additive reduct (S,+) is an inverse semigroup. The relations θ and k, induced by tr and ker (resp.), are congruences on the lattice C(S) of all congruences on S. For ρ ∈ C(S), we have introduced four congruences and on S and showed that and . Different properties of ρθ and ρκ have been considered here. A congruence ρ on S is a Clifford congruence if and only if is a distributive lattice congruence and is a skew-ring congruence on S. If η (σ) is the least distributive...
On the lattice of convex subsets of a partial monounary algebra
On the lattice of torsion classes of lattice ordered groups