Das Produkt von Hüllenstrukturen
Decidability of weak equational theories
Decomposability conditions for compatible relations
Decomposition of regular subsemigroup lattices.
Decompositions in lattices and some representations of algebras [Book]
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.
Demi-groupes, espaces affines et categories gauches
Demi-Semi-Primal Algebras and Mal'cev- Type Conditions.
Der Defkt endlicher abelscher Gruppen.
Die Darstellung von partiellen -stelligen Operationen
Die Einbettung von Mittelwertstrukturen in Q-Vektorräume.
Die subdirekte Unzerlegbarkeit der Intervallrechnung.
Die Verbände mit nichteinfacher Funktionenalgebra.
Different levels of word problems for some varieties.
Dimension theory for cyclically and cocyclically ordered sets
Direct decomposability of congruences in congruence-permutable varieties
Direct decomposability of tolerances and congruences on semigroups