10.07.2025, 16:15
– Raum 1.22
Forschungsseminar Differentialgeometrie
Cancellation properties of exotic 4-dimensional positive scalar curvature metrics
Johannes Ebert (Münster)
We give a new extrinsic upper bound for the smallest eigenvalues of the Dirac operator of a hypersurface. If the ambient manifold is the hyperbolic space, we show that its limiting case is achieved only for geodesic spheres.