On some properties a projective model class passes on to the generated axiomatic class.
On the congruence lattice of stable algebras with definability of compact congruences
Positively prime models over a normal basic set.
Quasi-axiomatic classes.
Remarks on quasivarieties of algebras
Ring-like operations is pseudocomplemented semilattices
Ring-like operations are introduced in pseudocomplemented semilattices in such a way that in the case of Boolean pseudocomplemented semilattices one obtains the corresponding Boolean ring operations. Properties of these ring-like operations are derived and a characterization of Boolean pseudocomplemented semilattices in terms of these operations is given. Finally, ideals in the ring-like structures are defined and characterized.
Semi-abelian monadic categories.
Solvability of equations in varieties of universal algebras.
Strong regular varieties of partial algebras I
...-Strukturen.
Subdirect representations in axiomatic classes
Sur La Logique De Premier Ordre Et La Théorie Des Catégories.
The strong amalgamation property
Various remarks on quasi-universal model classes.
Аксиоматизируемость и модельная полнота класса регулярных полигонов.
Аксиоматизируемость и полнота некоторых классов -полигонов.
Аксиоматизируемость одной проекции универсально аксиомтизируемого класса алгебраических систем
Алгебра Грецера и S-системы квазигрупп
Группоиды ранга 2, порождающие категоричные Хорновы классы.
Категоричные хорновы классы.I