Commutative quotients of finite W-algebras

Details Commutative quotients of finite W-algebras Commutative quotients of finite W-algebras

2008-09-03

arxiv.org/abs/0809.0663v2

Mathematics

Representation Theory

35 pages; one subsection added, some typos corrcted

Scientific paper

Let U(g,e) be the finite W-algebra associated with a nilpotent element e in a simple Lie algebra g and assume that e is induced from a nilpotent element e_0 in a Levi subalgebra l of g. We show that if the finite W-algebra U(l,e_0) has a 1-dimensional representation, then so does U(g,e). For g classical (and in may other cases), we compute the Krull dimension of the largest commutative quotient of U(g,e). Some applications to representation theory of modular counterparts of g are given.

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