CNRS researcher at the Computer Science Department of ENS (DI ENS), Université PSL, I am interested in various aspects of machine learning, statistics and signal processing. In the deep past (1990s), I started in the domain of speech and audio processing. More recently (2000s), I contributed to Bayesian methods, Markov Chain Monte Carlo and to some applications in natural language processing. Most of my recent works (since 2010) are related to online learning and multi-armed bandit models and I am also interested in privacy issues.

Affiliated to the Centre Sciences des Données (CSD) at ENS, I am heading the DATA Team. I am Adjunct professor at Université PSL, where I am in charge, with Clément Royer, Judith Rousseau and Christian Robert, of the second year (M2) of the master program IASD. I am also a Chair holder and member of the Executive committee of the Pr[AI]rie-PSAI (Paris School of AI) project.

News

(February 2026) Interested in working on trustworthy machine learning and looking for a postdoc position in Paris starting in 2026? Contact me (with CV an references) for further info.

(Janvier 2026) Je présenterai le livre Tout comprendre (ou presque) sur l’intelligence artificielle dans plusieurs médiathèques de la région parisienne cet hiver : le 31 janvier à Verrières-le-Buisson, le 7 février à Saint-Cloud, le 14 mars à Champigny-sur-Marne et le 28 mars à Vincennes. Le livre est également sélectionné pour le Prix du Public La science se livre du département des Hauts-de-Seine.