Systems of unary algebras with common endomorphisms. I
Systems of unary algebras with common endomorphisms. II
-гомоморфизмы колец
The automorphism group of unary algebras.
The automorphisms groups of symmetric algebras
The category of recursive functions
The minimal closed monoids for the Galois connection -
The minimal nontrivial endomorphism monoids of congruence lattices of algebras defined on a finite set are described. They correspond (via the Galois connection -) to the maximal nontrivial congruence lattices investigated and characterized by the authors in previous papers. Analogous results are provided for endomorphism monoids of quasiorder lattices .
Transferral of entailment in duality theory: dualisability
A number of new results that say how to transfer the entailment relation between two different finite generators of a quasi-variety of algebras is presented. As their consequence, a well-known result saying that dualisability of a quasi-variety is independent of the generating algebra is derived. The transferral of endodualisability is also considered and the results are illustrated by examples.
Transferral of entailment in duality theory II: strong dualisability
Results saying how to transfer the entailment in certain minimal and maximal ways and how to transfer strong dualisability between two different finite generators of a quasi-variety of algebras are presented. A new proof for a well-known result in the theory of natural dualities which says that strong dualisability of a quasi-variety is independent of the generating algebra is derived.
Transitively acting monoids of local automorphisms of locally finite trees
Turning retractions of an algebra into an algebra.
Über die Vollständigkeit der induktiven Gruppoide der partiellen Automorphismen von Algebren
Über Homomorphismen der Kontexte
Weak automorphisms of 1-unary algebras
Weak automorphisms of integral domains
Weak homomorphisms in implication algebra
Weak homomorphisms of distributive p-algebras
Weak isomorphisms of abelian lattice ordered groups
Абстрактная характеристика класса полугрупп эндоморфизмов систем общего вида
Внутренние гомоморфизмы и позитивно-условные термы