Homological stability for Iwahori–Hecke algebras

Abstract

We show that the Iwahori–Hecke algebras H n $\mathcal {H}_n$ of type A n − 1 $A_{n-1}$ satisfy homological stability, where homology is interpreted as an appropriate Tor group. Our result precisely recovers Nakaoka's homological stability result for the symmetric groups in the case that the defining parameter is equal to 1. We believe that this paper, and our joint work with Boyd on Temperley–Lieb algebras, are the first time that the techniques of homological stability have been applied to algebras that are not group algebras.