Identities with derivations and automorphisms on semiprime rings.
Immersions of module varieties
We show that a homomorphism of algebras is a categorical epimorphism if and only if all induced morphisms of the associated module varieties are immersions. This enables us to classify all minimal singularities in the subvarieties of modules from homogeneous standard tubes.
Injektive Moduln über Ringen linearer Differentialoperatoren.
Intertial Subalgebras over Hensel Rings.
Invariance properties of automorphism groups of algebras.
Isomorphisms and automorphisms of integral group rings