Corrigendum to "The join of the pseudovarieties of idempotent semigroups and locally trivial semigroups".
Covering condition in the lattice of radical classes of linearly ordered groups
Coverings in the lattice of quasivarieties of -groups.
Covers in the lattice of varieties of -groups.
C-S-maximal superassociative systems. II.
Cyclically ordered sets as partial algebras
A representation of cyclically ordered sets by means of partial semigroups with an additional unary operation is constructed.
Cyclicity in a special class of hypergroups
Das Produkt von Hüllenstrukturen
Decidability and structure
Decidability of equational theories of coverings of semigroup varieties.
Decidability of weak equational theories
Decidability problems for the variety generated by tournaments.
Decomposability conditions for compatible relations
Decomposition of regular subsemigroup lattices.
Decompositions in lattices and some representations of algebras [Book]
Decompositions of a -algebra.
Decompositions of commuting relations
Decompositions of homomorphisms
Decompositions of semigroups with zero.
Definability for equational theories of commutative groupoids
We find several large classes of equations with the property that every automorphism of the lattice of equational theories of commutative groupoids fixes any equational theory generated by such equations, and every equational theory generated by finitely many such equations is a definable element of the lattice. We conjecture that the lattice has no non-identical automorphisms.