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On the Definition of Almost Characters

  • G. Lusztig
Chapter
Part of the Progress in Mathematics book series (PM, volume 326)

Abstract

We define almost characters of G(Fq), where G is a reductive connected group over a finite field Fq, as explicit linear combinations of irreducible characters. Previously, these were defined assuming that the centre of G is connected.

Keywords

almost character Fourier transform character sheaf 

Mathematics Subject Classification (2010):

20G99 

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Copyright information

© Springer Nature Switzerland AG 2018

Authors and Affiliations

  • G. Lusztig
    • 1
  1. 1.Department of Mathematics, M.I.T.CambridgeUSA

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