The chapter starts by defining spherical and affine root systems. Next, the notion of BN-pair and of the associated building are presented and applied to groups of p-adic type, including an axiomatic description of the affine building. The additional section introduces affine Hecke algebras, a simplicial approach of buildings, Moy–Prasad filtrations, and applications to the representation theory of groups of p-adic type.

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Groups of p-adic type

  • Ian G. Macdonald,
  • Anne-Marie Aubert

摘要

The chapter starts by defining spherical and affine root systems. Next, the notion of BN-pair and of the associated building are presented and applied to groups of p-adic type, including an axiomatic description of the affine building. The additional section introduces affine Hecke algebras, a simplicial approach of buildings, Moy–Prasad filtrations, and applications to the representation theory of groups of p-adic type.