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Stable Conjugacy: Definitions and Lemmas

Published online by Cambridge University Press:  20 November 2018

R. P. Langlands
R. P. Langlands*
Affiliation:
The Institute for Advanced Study, Princeton, New Jersey
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The purpose of the present note is to introduce some notions useful for applications of the trace formula to the study of the principle of functoriality, including base change, and to the study of zeta-functions of Shimura varieties. In order to avoid disconcerting technical digressions I shall work with reductive groups over fields of characteristic zero, but the second assumption is only a matter of convenience, for the problems caused by inseparability are not serious.

The difficulties with which the trace formula confronts us are manifold. Most of them arise from the non-compactness of the quotient and will not concern us here. Others are primarily arithmetic and occur even when the quotient is compact. To see how they arise, we consider a typical problem.

Type
Research Article
Information
Canadian Journal of Mathematics , Volume 31 , Issue 4 , 01 August 1979 , pp. 700 - 725
Copyright
Copyright © Canadian Mathematical Society 1979

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