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Formal Dimension for Semisimple Symmetric Spaces

Published online by Cambridge University Press:  04 December 2007

Bernard Krötz
Affiliation:
The Ohio State University, Department of Mathematics, 231 West 18th Avenue, Columbus, OH 43202, U.S.A. E-mail: [email protected]
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Abstract

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If G is a semisimple Lie group and (π, $\cal H$) an irreducible unitary representation of G with square integrable matrix coefficients, then there exists a number d(π) such that ($\forall$v, v′, w, w′ ∈ $\cal H$) 1/d(π) 〈v, v′〉 〈w′, w〉 = ∫G 〈π(g).v,w$\overline$ 〈π(g).v′.w′〉 dμG(g). The constant d(π) is called the formal dimension of (π, $\cal H$) and was computed by Harish-Chandra in [HC56, 66]. If now H\G is a semisimple symmetric space and (π, $\cal H$) an irreducible H-spherical unitary (π, $\cal H$) belonging to the holomorphic discrete series of H\G, then one can define a formal dimension d(π) in an analogous manner. In this paper we compute d(π) for these classes of representations.

Type
Research Article
Copyright
© 2001 Kluwer Academic Publishers