Does imply axiom of choice?
Double lexicographic products
Double -ary relational structures
In [7], V. Novak and M. Novotny studied ternary relational structures by means of pairs of binary structures; they obtained the so-called double binary structures. In this paper, the idea is generalized to relational structures of any finite arity.
Double -algebras with Stone congruence lattices
DR-irreducibility of connected monounary algebras
DR-irreducibility of connected monounary algebras with a cycle
Dualisation dans les algèbres abstraites
Dualities for Stone algebras, double Stone algebras, and relative Stone algebras
Dualities in lattices of semigroup varieties.
Duality for Cardinal Algebras.
Duality for some free modes
The paper establishes a duality between a category of free subreducts of affine spaces and a corresponding category of generalized hypercubes with constants. This duality yields many others, in particular a duality between the category of (finitely generated) free barycentric algebras (simplices of real affine spaces) and a corresponding category of hypercubes with constants.
Durch Relationen induzierte Topologien
EDZ-varieties: The Schreier property and epimorphisms onto
E-free objects and E-locality for completely regular semigroups.
Eigenspace of a circulant max–min matrix
The eigenproblem of a circulant matrix in max-min algebra is investigated. Complete characterization of the eigenspace structure of a circulant matrix is given by describing all possible types of eigenvectors in detail.
Ein Axiomensystem für Baum-Algebren
Ein Radikal für universale Algebren und seine Anwendung auf Polynomringe mit Komposition.
Ein Satz über reproduktive Lösungen.
Einige Bemerkungen über Clones und interpolierbare Funktionen auf universellen Algebren
Einige Charakterisationen von Ketten