Emiliano AMBROSI
02/2026- 07/2026
Emiliano Ambrosi is a mathematician specializing in arithmetic geometry in positive characteristic. His research focuses on the application of various p-adic cohomology theories to concrete problems in arithmetic and geometry. Recently, he has become interested in exploring how pathologies in positive characteristic can be used to study geometric problems in characteristic 0, by using integral p-adic Hodge theory.
Gaétan FOURNIER
01/2026_08/2026
Gaëtan Fournier is a French mathematician interested in optimisation, game theory and its applications in quantitative finance and theoretical economics. His interests cover problems where agents make strategic use of their informational advantages in repeated games, or where they compete in space for clientele in industrial organisation or for voters in an electoral competition.
Radu IGNAT
09/2025-02/2026
Radu Ignat is a mathematician with expertise in nonlinear analysis,
partial differential equations and calculus of variations. He is
particularly interested in singular phenomena in variational models
coming from physics. He is a former member of Institut Universitaire de
France.
Laurent NIEDERMAN
09/2025-02/2026
Laurent Niederman is a French mathematician whose research interests include dynamical systems, celestial mechanics, and Hamiltonian perturbation theory. His work focuses in particular on the long-term behavior of solutions of nearly integrable Hamiltonian systems, with a special interest in applications to the three-body planetary problem—a classical model used to describe the motion of celestial bodies in the solar system.
Frédéric PATRAS
09/2024-02/2025
Frédéric Patras is a mathematician, specialised in algebra and its applications in combinatorics, probability and mathematical physics. He authored with Pierre Cartier “Classical Hopf Algebras and Their Applications”, Algebra and Applications, Springer, 2021. He is also philosopher of mathematics, author in particular of “Contemporary Mathematical Thinking¨, Synthese Library 474, Springer, 2023 and “The Essence of Numbers”, Lecture Notes in Mathematics, History of Mathematics Subseries, Springer 2020. With J.-P. Marquis, he edits the Annals of Mathematics and Philosophy.
Thierry PAUL
06/2022-06/2023 12/2023-
Thierry Paul is a mathematician and a mathematical physicist. His interests cover a large scope of domains, lately mostly linked with problems arising in quantum mechanics and kinetic theory but also with low dimension topology. He is very much interested in interactions of mathematics with other fields, including philosophy and music. He edited with Michael Schmidt the volume RIGUEUR, Spartacus, Paris 2021 and ran with Jocelyn Benoist the “Réseau Thématique Plurisdisciplaire ” PHENOMATH CNRS INSMI&InSHS. He was awarded the International prize “Tullio Levi-Civita” 2021.
He is the director of LYSM since January first 2024.