Around Helffer-Nourrigat conjecture (history, proof, open questions and applications)
Event details
| Date | 16.06.2025 |
| Hour | 11:00 › 12:00 |
| Speaker | Bernard Helffer, Laboratoire de Mathématiques Jean Leray, Université de Nantes |
| Location | |
| Category | Conferences - Seminars |
| Event Language | English |
After recalling the main advances about the study of hypoelliptic differential operators in th 1970’s, he will present how we came with Jean Nourrigat to the statement of our conjecture about the maximal hypoellipticity of polynoms of vector fields. This was recently proved by Ianivos Androulidakis, Omar Mohsen and Robert Yuncken with new techniques inspired by the Connes-Skandalis C*-algebraic approach. Then he will present the microlocal version of maximal hypoellipticity and recently studied applications related with PDE or mathematical physics problems.
Practical information
- Informed public
- Free
Organizer
- Francis Nier (Paris University), Tony Lelièvre (Ecole des Ponts-Paris Tech), Omar Mohsen (Paris-Saclay University), Shu Shen (Sorbonne University)
Contact
- Francis Nier (nier@math.univ-paris13.fr)