30.05.2025, 11:00
– Campus Golm, Building 9, Room 2.22 and via Zoom
Arbeitsgruppenseminar Analysis
E-symplectic and almost regular Poisson manifolds
Alfonso Garmendia (Bonn)
Christian Rose (Technische Universität Chemnitz)
We show that if the negative part of the Ricci curvature of a compact manifold is in the Kato-class, the Cheeger constant of the manifold can be bounded below by a positive constant. This is obtained by suitable heat kernel and eigenvalue estimates as well as a Buser-type inequality which relates the Cheeger constant and the first non-zero eigenvalue.