P. Deligne

collaborators

2 papers

math.RT2025

Unipotent representations: changing q to -q, II

P. Deligne, G. Lusztig

Consider a Chevalley group over a finite field F_q such that the longest element in the Weyl group is central. In this paper we study the effect of changing q to -q in the polynomi…

math.RT2025

Unipotent representations: changing q to -q

P. Deligne, G. Lusztig

Consider a Chevalley group over a finite field $F_{q}$ such that the longest element of the Weyl group is central. We construct an involution $I^¾ \mapsto I^¾^{!}$ of the set of unipotent…