Bertoin is a specialist in
probability theory. His research deals with
Lévy processes,
Brownian motion,
branching processes, random fragmentation, and coalescence processes. Bertoin has received numerous awards, including the CNRS Bronze Medal (1992), the
Rollo Davidson Prize (1996), and the Thérèse Gautier Prize (2015). He was an invited speaker at the
ICM (2002) and
ECM (2012), and elected a corresponding member of the
Mexican Academy of Sciences in 2011. His doctoral students include
Grégory Miermont. ==Selected publications==