Algèbres de Hecke affines génériques
Algèbres de Hecke affines génériques
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DOI:
10.1090/s1088-4165-06-00185-3
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发表时间:
2003
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影响因子:
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通讯作者:
M. Vignéras
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文献类型:
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作者:
M. Vignéras
Let $H$ be a generic affine Hecke algebra (Iwahori-Matsumoto definition) over a polynomial algebra with a finite number of indeterminates over the ring of integers.
We prove the existence of an integral Bernstein-Lusztig basis related to the Iwahori-Matsumoto basis by a strictly upper triangular matrix, from which we deduce that the center $Z$ of $H$ is finitely generated and that $H$ is a finite type $Z$-module (this was proved after inversion of the parameters by Bernstein-Lusztig), and we give some applications to the theory of $H$-modules where the parameters act by 0.
These results are related to the smooth $p$-adic or mod $p$ representations of reductive $p$-adic groups. We introduce the supersingular modules of the affine Hecke algebra of GL(n) with parameter 0, probably analogues of the Barthel-Livne supersingular mod $p$ representations of GL(2).