The CRM-CNRS welcomes Didier Lesesvre for a long stay

Starting from January 4, 2026, and for six months, the CRM-CNRS welcomes Didier Lesesvre.

Didier LESESVRE

Lecturer, University of Lille

01/04/2026 – 03/07/2026

Didier Lesesvre is a lecturer at the University of Lille. His research focuses on number theory and the analytic theory of automorphic forms. He completed his thesis in Paris under the supervision of Farrell Brumley, during which he benefited from long research stays at EPFL with Ian Petrow and Philippe Michel, as well as in Göttingen with Valentin Blomer. He defended his thesis in 2018 and then worked for three years at Sun Yat-Sen University in China.

His work particularly focuses on families of automorphic forms, using duality formulas derived from non-commutative harmonic analysis: the trace formulas. While automorphic forms are difficult to study individually, these tools allow for obtaining arithmetic statistics, average results on these families. He has worked to make Arthur’s trace formula usable in practice within the framework of quaternion algebras, or the relative trace formula in the context of GSp(4). He has thus established Weyl laws for certain families of automorphic forms, density theorems controlling the number of exceptional forms, provided global and local distribution results, and studied various statistics on the zeros of automorphic L-functions.