Associated varieties and Howe’s<i>N</i>-spectrum
Associated varieties and Howe’s<i>N</i>-spectrum
HONGYU HELet G be a real semisimple group.Two important invariants are associated with the equivalence class of an irreducible unitary representation of G, namely, the associated variety of the annihilator in the universal enveloping algebra and Howe's N-spectrum, where N is a nilpotent subgroup of G.The associated variety is defined …