A Soergel-like category for complex reflection groups of rank one

Abstract

We introduce analogues of Soergel bimodules for complex reflection groups of rank one. We give an explicit parametrization of the indecomposable objects of the resulting category and give a presentation of its split Grothendieck ring by generators and relations. This ring turns out to be an extension of the Hecke algebra of the reflection group $W$ and a free module of rank $|W|(|W|-1)+1$ over the base ring. We also show that it is a generically semisimple algebra if defined over the complex numbers.

24 pages. Comments welcome !