Upcoming talks
April 22, 2026
- Regina Rotman: Lengths of geodesics on Riemannian manifolds
(16:30 Paris, 10:30 am NYC) - Let $M$ be a closed Riemannian manifold. I will present some upper bounds for the lengths of geodesic loops based at a point $p \in M$, periodic geodesics, geodesic chords orthogonal to a closed submanifold $N$ of $M$. In particular, I will show that on any closed Riemannian manifold $M$ of dimension 3 and of scalar curvature greater than or equal to 6 there exists a non-trivial closed geodesic of lenght at most 22500, (joint with Y. Liokumovich and D. Maximo).
May 6, 2026
- Jintian Zhu: A proof of Riemannian positive mass theorem up to dimension 19
(16:30 Paris, 10:30 am NYC) - In this talk, I will explain our idea to establish positive mass theorem (PMT) up to dimension 19, which was later developed by Brendle and Wang to show PMT in all dimensions. This is a joint work with Yuchen Bi, Tianze Hao, Shihang He and Yuguang Shi.
May 20, 2026
- Karl-Theodeor Sturm: tba
(16:30 Paris, 10:30 am NYC)
Previous talks
Seminar Info
Each session will consist of one or two lectures on a recent advance in geometry. Not all the talks will concern scalar curvature but perhaps many will. Each talk will be followed by a discussion both in person and online. Everyone is welcome to join the session live (zoom) or watch the recorded videos of the talks later.Zoom starts at 16:30 Paris time:
click here to register and receive linkIHES Carmin TV Channel Info:
https://www.carmin.tv/en/collections/not-only-scalar-curvature-seminarOrganizers
Misha Gromov, IHES
Website: https://www.ihes.fr/~gromov/
Bernhard Hanke, University of Augsburg
Website: https://www.uni-augsburg.de/de/fakultaet/mntf/math/prof/diff/team/bernhard-hanke/
Christina Sormani, CUNY Graduate Center and Lehman College
Website: https://sites.google.com/site/professorsormani/home
Gouliang Yu, Texas A&M University
Website: https://www.math.tamu.edu/people/formalpg.php?user=guoliangyu