Minimal algebras and category equivalences
Strong regular varieties of partial algebras I
Varieties generated by two-element majority algebras and their equivalences
Categorical equivalences of varieties generated by algebras and
Präprimale Algebren, die arithmetische Varietäten erzeugen
Solid varieties of semigroups.
Hyperassociative varieties of semigroups.
Pre-solid varieties of semigroups
Pre-hyperidentities generalize the concept of a hyperidentity. A variety is said to be pre-solid if every identity in is a pre-hyperidentity. Every solid variety is pre-solid. We consider pre-solid varieties of semigroups which are not solid, determine the smallest and the largest of them, and some elements in this interval.
On the characterization of primal partial algebras by strong regular hyperidentities.
On varieties generated by Boolean clones.
Green's-like relations on algebras and varieties.
Unsolid and fluid strong varieties of partial algebras.
Clone automorphisms and hypersubstitutions.
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