Quotients, automorphisms and differential operators
Quotients, automorphisms and differential operators
Let V be a G-module, where G is a complex reductive group. Let Z≔V//G denote the categorical quotient and let π : V→Z be the morphism dual to the inclusion 𝒪(V)G⊂𝒪(V). Let φ : Z→Z be an algebraic automorphism. Then one can ask whether there is an algebraic map Φ …