A Mackey Imprimitivity Theory for Algebraic Groups.
A note on the characters of the projective modules for the infinitesimal subgroups of a semisimple algebraic group.
Algebras with finitely generated invariant subalgebras
We classify all finitely generated integral algebras with a rational action of a reductive group such that any invariant subalgebra is finitely generated. Some results on affine embeddings of homogeneous spaces are also given.