Strings and (Non)-Geometry
Prof. Dr. Dieter Lüst (LMU München und Max-Planck Institut für Physik)

In this talk I discuss the relation between strings and geometry. Due to stringy symmetries, there is a subtle mixing between the UV and the IR in string theory. As a result, stringy geometry goes be beyond standard Riemannian geometry. We show that the corresponding non-geometric backgrounds can be described by non-commutative or even non-associative geometries.