English

Modular generalized Springer correspondence III: exceptional groups

Representation Theory 2017-09-12 v3

Abstract

We complete the construction of the modular generalized Springer correspondence for an arbitrary connected reductive group, with a uniform proof of the disjointness of induction series that avoids the case-by-case arguments for classical groups used in previous papers in the series. We show that the induction series containing the trivial local system on the regular nilpotent orbit is determined by the Sylow subgroups of the Weyl group. Under some assumptions, we give an algorithm for determining the induction series associated to the minimal cuspidal datum with a given central character. We also provide tables and other information on the modular generalized Springer correspondence for quasi-simple groups of exceptional type, including a complete classification of cuspidal pairs in the case of good characteristic, and a full determination of the correspondence in type G2G_2.

Keywords

Cite

@article{arxiv.1507.00401,
  title  = {Modular generalized Springer correspondence III: exceptional groups},
  author = {Pramod N. Achar and Anthony Henderson and Daniel Juteau and Simon Riche},
  journal= {arXiv preprint arXiv:1507.00401},
  year   = {2017}
}

Comments

40 pages. Version 2: added section 7.5, modified Table 5.2 to match current conventions of GAP3. Version 3 has minor edits suggested by the referee, including a slight strengthening of Proposition 3.2; final version, to appear in Math. Annalen

R2 v1 2026-06-22T10:04:08.739Z