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.
Keywords:
Subalgebra Mathematics Finitely-generated abelian group Invariant (physics) Homogeneous Pure mathematics Affine transformation Stallings theorem about ends of groups Action (physics) Algebra over a field Combinatorics Physics