On isoperimetric surfaces in Riemannian manifolds Jan Metzger (Potsdam) In this talk I will present joint work with Michael Eichmair. We consider the isoperimetric problem in asymptotically flat manifolds of arbitrary dimension which are close in $C^0$ to Schwarzschild. We show that for given large enough volume there exists a smooth connected isoperimetric surface enclosing this volume. If the metric is $C^2$-close to Schwazschild, the isoperimetric regions for large volume are unique. Furthermore, if the manifold has a relativistic center of mass, it is the asymptotic center of the boundaries of these regions.