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Lie superalgebras, Clifford algebras, induced modules and nilpotent orbits

Author:
Musson, Ian M.  


Journal:
ADVANCES IN MATHEMATICS


Issue Date:
2006


Abstract(summary):

Let g be a classical simple Lie superalgebra. To every nilpotent orbit O in g(0) we associate a Clifford algebra over the field of rational functions on O. We find the rank, k(O) of the bilinear form defining this Clifford algebra, and deduce a lower bound on the multiplicity of a U(g)-module with O or an orbital subvariety of O as associated variety. In some cases we obtain modules where the lower bound on multiplicity is attained using parabolic induction. The invariant k(O) is in many cases, equal to the odd dimension of the orbit G center dot O, where G is a Lie supergroup with Lie superalgebra g. (c) 2006 Published by Elsevier Inc.


Page:
39---72


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