Cartesian closedness in categories of partial algebras.
Categorical equivalences of varieties generated by algebras and
Categories of functors between categories with partial morphisms
It is well-known that the composition of two functors between categories yields a functor again, whenever it exists. The same is true for functors which preserve in a certain sense the structure of symmetric monoidal categories. Considering small symmetric monoidal categories with an additional structure as objects and the structure preserving functors between them as morphisms one obtains different kinds of functor categories, which are even dt-symmetric categories.
Categories of locally diagonal partial algebras.
Central extensions in Mal'tsev varieties.
Centrality and normality in protomodular categories.
Characterization of protomodular varieties of universal algebras.
Clone properties of topological spaces
Clone properties are the properties expressible by the first order sentence of the clone language. The present paper is a contribution to the field of problems asking when distinct sentences of the language determine distinct topological properties. We fully clarify the relations among the rigidity, the fix-point property, the image-determining property and the coconnectedness.
Clones in topology and algebra.
Closedness properties of internal relations. IV: Expressing additivity of a category via subtractivity.
Colimits of representable algebra-valued functors.
Complétion et complétude selon H. Andreka et I. Nemeti
Congruence relations on finitary models
Construction of all strong homomorphisms of binary structures