20 Jun 2019 Opening Colloquium Mathematics Münster: Dynamics - Geometry - Structure The new Cluster of Excellence "Mathematics Münster: Dynamics - Geometry - Structure" will commence in January 2019. On this occasion we will hold an opening colloquium on June 20-22, 2019. 18 Dez 2018 Tobias Fritz (Waterloo): Hypergraph C*-algebras, quantum logic, and undecidability. Oberseminar C*-Algebren. Hypergraph C*-algebras are C*-algebras presented by a finite set of projections satisfying some partition of unity relations. Equivalently, they are the finite ... 18 Dez 2018 Prof. Dr. Nathalie Sinclair (Simon Fraser University, Canada): Teachers? use of dynamism in designing MERLO tasks for geometry Kolloquium über Geschichte und Didaktik der Mathematik 18 Dez 2018 J. Scholbach: The intersection cohomology motive of the moduli stack of shtukas (MIttagsseminar zur Arithmetik) In these talks, I will report on joint work with Timo Richarz. We construct a motivic refinement of various intersection complexes on the moduli stack of G-shtu... 17 Dez 2018 Eugen Hellmann (Universität Münster): Introduction to the Langlands program. (Oberseminar Topologie) 19 Dez 2018 Dr. Christian Zillinger (University of Southern California): Stabilization by mixing: On linear damping for the 2D Euler equations In recent years, following the seminal works of Villani and Mouhot on Landau damping, phase-mixing as a damping mechanism and inviscid damping in fluids have at... 19 Dez 2018 Oberseminar Algebra und Geometrie: Raimar Wulkenhaar: Über einen möglichen Verwandten des Kontsevich-Modells, II Abstract: (Fortsetzung vom 5.12.) Nach [Kontsevich, 1992] sind Schnittzahlen von Geradenbündeln über dem Modulraum Riemannscher Flächen aus den Amplituden von B... 20 Dez 2018 Martin Bays: Density of compressibility Distal theories are NIP theories which are "wholly unstable". Chernikov and Simon's "strong honest definitions" characterise distal theories as those in which every type is compressible. Adapting recent work in machine learning of Chen, Cheng, and Tang on bounds on the "recursive teaching dimension" of a finite concept class, we find that compressibility is dense in NIP structures, i.e. any formula can be completed to a compressible type in S(A). Considering compressibility as an isolation notion (which specialises to l-isolation in stable theories), we obtain consequences on the existence of models with certain properties. Joint with Itay Kaplan and Pierre Simon.