Invariants for automorphisms of certain iterated skew polynomial rings
Invariants for automorphisms of certain iterated skew polynomial rings
Rings of invariants are identified for some automorphisms θ of certain iterated skew polynomial rings R , including the enveloping algebra of sl 2 ( k ), the Weyl algebra A 1 and their quantizations. We investigate how finite-dimensional simple R -modules split over the ring of invariants R θ …