On the Steinberg character of a semisimple p-adic group

We show that the character of the Steinberg representation of a split semisimple p-adic group at a very regular element is given (up to sign) by a power of q, the number of elements in the residue field. We also show that (under an assumption on the characteristic) the character of an Iwahori-spheri...

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Bibliographic Details
Main Authors: Lusztig, George (Contributor), Kim, Ju-Lee (Contributor)
Other Authors: Massachusetts Institute of Technology. Department of Mathematics (Contributor)
Format: Article
Language:English
Published: Mathematical Sciences Publishers, 2015-01-20T15:43:51Z.
Subjects:
Online Access:Get fulltext
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100 1 0 |a Lusztig, George  |e author 
100 1 0 |a Massachusetts Institute of Technology. Department of Mathematics  |e contributor 
100 1 0 |a Kim, Ju-Lee  |e contributor 
100 1 0 |a Lusztig, George  |e contributor 
700 1 0 |a Kim, Ju-Lee  |e author 
245 0 0 |a On the Steinberg character of a semisimple p-adic group 
260 |b Mathematical Sciences Publishers,   |c 2015-01-20T15:43:51Z. 
856 |z Get fulltext  |u http://hdl.handle.net/1721.1/92975 
520 |a We show that the character of the Steinberg representation of a split semisimple p-adic group at a very regular element is given (up to sign) by a power of q, the number of elements in the residue field. We also show that (under an assumption on the characteristic) the character of an Iwahori-spherical representation at a split very regular element is given by a trace in the corresponding Hecke algebra module. 
520 |a National Science Foundation (U.S.) 
546 |a en_US 
655 7 |a Article 
773 |t Pacific Journal of Mathematics