Volker Heiermann is a Professor of Mathematics at the Aix Marseille Université, Luminy.
Dipendra Prasad is a Professor of Mathematics at the Tata Institute of Fundamental Research, Mumbai.
The authors are established researchers in the broad subject of Automorphic forms who came together at CIRM Luminy during the first half of 2016 on Chaire Morlet,a distinguished research Chaire created by the CIRM, Aix Marseille University, the city of Marseille.