Cyril Letrouit is a research fellow at CNRS, where he was recruited in 2022. He works at the Laboratoire de Mathématiques d'Orsay. He defended his thesis under the supervision of Emmanuel Trélat and Yves Colin de Verdière in 2021, after studying at the École normale supérieure. He did postdoctoral research at the Massachusetts Institute of Technology in 2022-2023.
Part of his work focuses on understanding how the geometry of an object affects its physical properties. The tools he uses are derived from partial differential equations and geometry. His first works focused on the propagation and control of waves in particular geometries, known as sub-Riemannian. He then turned to the study of standing waves in varieties and graphs, using analytical approaches common to both types of object. At the same time, fascinated by the applications of mathematics, he is developing analytical tools to tackle problems arising from artificial intelligence, for example to understand how large artificial neural networks work. He works in collaboration with colleagues in France, Switzerland, Italy, Canada and the USA.
Cyril Letrouit is the winner of the Claude-Antoine Peccot Prize for 2024-2025, nominated by Prof. Pierre-Louis Lions, Chair of Partial Differential Equations and Applications.