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Research Article

A note on sign of a self-dual representation

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Pages 4724-4729 | Received 01 Dec 2020, Accepted 04 May 2021, Published online: 04 Jun 2021
 

Abstract

D. Prasad showed that the sign of a self-dual representation of a finite or p-adic reductive group is often detected by a central element. We study the extension of his results to some more general situations and make some observations about the consequences of his results.

2020 Mathematics Subject Classification:

Acknowledgment

The author thanks Alan Roche for pointing out mistakes in an earlier draft of this article. The statements of Corollaries 2 and 9 are due to him. They were remarked to the author during our correspondence. The author also thanks Dipendra Prasad for many helpful discussions. Section 3.3 in this note benefits from the ideas in [Citation2]. The author is most thankful to the anonymous referee for his thorough report. The contents of §3.2 are entirely due to him.

Additional information

Funding

This article was partially funded by MATRICS and ECRA grants of the Science and Engineering Research Board.

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