On a Non-Abelian Variety of Groups which are Symmetric Algebras.
On a representation of semigroups by products of algebras and relations
On algebras of relations
On atoms in lattices of primitive classes
On categories of structures and classes of algebras [Book]
On classes of algebras definable by regular equations
On completions of partial monounary algebras
On extending congruences from partial algebras
On free pseudo-complemented and relatively pseudo-complemented semi-lattices
On Grätzer's problem of binary 1-step congruence schemes
On locally small based algebraic theories
On one problem in the theory of partial monounary algebras
On primary and reduced varieties of monoassociative algebras.
On semisimple bands.
On some congruences of power algebras
In a natural way we can “lift” any operation defined on a set A to an operation on the set of all non-empty subsets of A and obtain from any algebra (A, Ω) its power algebra of subsets. In this paper we investigate extended power algebras (power algebras of non-empty subsets with one additional semilattice operation) of modes (entropic and idempotent algebras). We describe some congruence relations on these algebras such that their quotients are idempotent. Such congruences determine some class...
On some constructions of algebraic objects
Mono-unary algebras may be used to construct homomorphisms, subalgebras, and direct products of algebras of an arbitrary type.
On some operator defined on equational classes of algebras
On the arity of affine modules
On the failure of Birkhoff's theorem for locally small based equational categories of algebras
On the structure of semilattice sums