Article ID Journal Published Year Pages File Type
4596132 Journal of Pure and Applied Algebra 2015 19 Pages PDF
Abstract

This is the second of two articles that consider the pairs of complex reductive groups (G,K)=(Sp(2n),Sp(2p)×Sp(2q))(G,K)=(Sp(2n),Sp(2p)×Sp(2q)) and (SO(2n),GL(n))(SO(2n),GL(n)) and components of Springer fibers associated to closed K-orbits in the flag variety of G  . In the first an algorithm is given to compute the associated variety of any discrete series representation of GR=Sp(p,q)GR=Sp(p,q) and SO⁎(2n)SO⁎(2n) and to concretely describe the corresponding component of a Springer fiber. These results are used here to compute associated cycles of discrete series representations. For each Harish-Chandra cell containing a discrete series representation, a particular discrete series representation is identified for which the structure of the component is sufficiently simple that the multiplicity in the associated cycle can be calculated. Coherent continuation is then applied to compute associated cycles of all representations in such a cell.

Related Topics
Physical Sciences and Engineering Mathematics Algebra and Number Theory
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