Notes on lattice congruences
Notes on left distributive groupoids
Number of polynomials in dependence preserving algebras
On 2-homogeneity of monounary algebras
Fraïssé introduced the notion of a -set-homogeneous relational structure. In the present paper the following classes of monounary algebras are described: , , —the class of all algebras which are 2-set-homogeneous with respect to subalgebras, connected subalgebras, connected partial subalgebras, respectively, and , , —the class of all algebras which are 2-homogeneous with respect to subalgebras, connected subalgebras, connected partial subalgebras, respectively.
On 3-semigroups and 3-groups polynomial-derived from integral domains.
On a cancellation law for monounary algebras.
On a cancellation law for monounary algebras
In this paper we investigate the validity of a cancellation law for some classes of monounary algebras.
On a certain construction of lattice expansions
We obtain a simple construction for particular subclasses of several varieties of lattice expansions. The construction allows a unified approach to the characterization of the subdirectly irreducible algebras
On a characterization of the lattice of subsystems of a transition system.
On a class of groupoids
On a class of subdirectly irreducible groupoids
On a conjecture of Rhodes.
On a Generalization of Permutable Equivalence Relations
On a mechanism of defining morphisms in concrete categories
On a modification of axioms of general relations
Basic concepts concerning binary and ternary relations are extended to relations of arbitrary arities and then investigated.
On a modification of relational axioms
On a multiplication of semigroup varieties.
On a Non-Abelian Variety of Groups which are Symmetric Algebras.
On a power of relational structures
On a problem of B. Zelinka