On 1 and 2 March 2021, the Berlin Mathematical School will host its first online BMS Days. On Tuesday, 2 March 2021 all events will be open to the MATH+ community. We are pleased to invite you to attend the following two talks: Gabriele Steidl (TU Berlin) – Motion and Deformation in Mathematical Imaging (11:00 am); Gaëtan Borot (HU Berlin) – Matrix models and counting surfaces: from combinatorics...

In this talk, Schwartz will explain the bounds proved by Halpern and Weaver and then show how to improve the lower bound. He will also explain an approach to getting the sharp bound, which amounts to approximating a paper Möbius band by certain kinds of finite tensegrities. Richard E. Schwartz got his Ph.D. in mathematics from Princeton University in 1991. He is currently the Chancellor Professor...

Large ensembles of points with Coulomb interactions arise in various settings of condensed matter physics, classical and quantum mechanics, statistical mechanics, random matrices and even approximation theory, and they give rise to a variety of questions pertaining to analysis, partial differential equations and probability. Sylvia Serfaty is the Silver Professor of Mathematics at the Courant Ins...

Complex coupled systems arise in medicine, science and engineering. Mathematically, these can be nonlinear coupled systems of PDEs or the nonconvex minimization problems found in deep learning. In this talk, we show how multi-scale approaches give a mathematical technique for accurate and efficient simulation of complex systems. Rolf Krause holds a chair of advanced scientific computing in the Fa...

An expander graph may be defined in any of several ways: in terms of boundaries of vertex sets, or in terms of eigenvalues of the graph Laplacian, or by random walks... Expander graphs have become a central object of study in discrete mathematics. Helfgott will discuss a graph that encodes the divisibility properties of integers by primes. Harald Helfgott is a Humboldt Professor at the University...

We have three more MATH+ Friday Talks coming up in the current winter semester:  15 January: Harald Helfgott (Göttingen) 22 January: Rolf Krause (Lugano) 05 February: Sylvia Serfaty (Courant Institute, NYU)