06.11.2024, 14:00 - 16:00
– Campus Golm, Building 9, Room 2.22 and via Zoom
Institutskolloquium
Graphon Models for Inhomogeneous Random Graphs
Olga Klopp (Paris), Nicolas Verzelen (Montpellier)
Klaus Kröncke (Tübingen)
We prove stability of integrable ALE manifolds with a parallel spinor under Ricci flow, given an initial metric which is close in \(L^p\cap L^{\infty}\), for any \(p \in (1, n)\), where n is the dimension of the manifold. In particular, our result applies to all known examples of 4-dimensional gravitational instantons.
The result is obtained by a fixed point argument, based on novel estimates for the heat kernel of the Lichnerowicz Laplacian. It allows us to give a precise description of the convergence behaviour of the Ricci flow. Our decay rates are strong enough to prove positive scalar curvature rigidity in \(L^p\), for each \(p\in [1,\frac{n}{n-2})\), generalizing a result by Appleton. This is joint work with Oliver Lindblad Petersen.
Zoom access data are available at this moodle.