# Spring 2021 Colloquium

The colloquium meets Thursdays at 4:10 pm to 5:00 pm virtually. We will have at least two talks every month. Lectures last 50 minutes and are followed by a short question period. The mathematical public is cordially invited to attend.

Olga Holtz, Colloquium Chair

### Spring 2021

Date | Speaker | Title |
---|---|---|

January 28 | Elena Giorgi, Princeton University | The stability of black holes with matter |

February 4 | Lei Chen, Caltech | Actions of Homeo and Diffeo groups on manifolds |

February 11 | Alexander Volberg, Michigan State University | The solution of Enflo’s problem |

February 18 | Matthew Kwan, Stanford University | Ramsey graphs and anti-concentration |

February 25 | Martin Olsson, University of California-Berkeley | Reconstruction of algebraic varieties |

March 4 | Volker Mehrmann, Technische Universität Berlin | Regularity, stability and passivity distances for dynamical systems with port-Hamiltonian structure |

March 11 | Bowen lecture (no colloquium) | |

March 18 | Tatiana Toro, University of Washington | How do Partial Differential Equations detect Geometry in Euclidean space? |

March 25 | Spring Break (no colloquium) | |

April 1 | Inwon Kim, University of California Los Angeles | Dynamics of Congested Crowds and Incompressible Fluids |

April 8 | Konstantin Tikhomirov, Georgia Institute of Technology | Singularity of random Bernoulli matrices |

April 15 | Alberto Grünbaum, University of California Berkeley | Signal processing miracles and the Korteweg-de Vries equation |

April 22 | Claudia de Rham, University College London | Analyticity in the Sky with (causal) Diamonds |

April 29 | Lillian Pierce, Duke University | Counting problems: open questions in number theory, from the perspective of moments |

May 6 | Anna Erschler, École Normale Supérieure and Institute for Advanced Study | Poisson boundary for random walks on groups |