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 characterization of the lattice of subsystems of a transition system.
On a class of groupoids
On a class of subdirectly irreducible groupoids
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 power of relational structures
On a problem of B. Zelinka
On a problem of B. Zelinka, II
On a problem of saturation of certain reduced direct products
On a Question of J. Hashimoto
On a relationship between monoids and monounary algebras
On a representation of groupoids as sums of directed systems
On a Representation of Lattices by Congruence Relations