20
Jun
2024
Thomas Geisser (Rikkyo University): Brauer and Neron-Severi groups of surfaces over finite fields
Abstract: For a smooth and proper surface over a finite field, the formula of Artin and Tate relates the behavior of the zeta-function at $1$ to other invarian...
24
Jun
2024
Oberseminar p-adische Arithmetik: Analytic stacks: Lucas Mann: Concluding, Overview of the rest and Outlook I, Expert I
24
Jun
2024
Tee-Seminar: Dr. Kevin Klinge (KIT Karlsruher Institut für Technololgie): ?-Invariants and nilpotent groups
The classical ?-invariant can be used to determine finiteness properties of kernels of maps onto abelian groups. I will present an analogue invariant that allow...
24
Jun
2024
Oberseminar Differentialgeometrie: Oskar Riedler (Universität Münster), Vortrag: Eigenfamilies and polynomial harmonic morphisms
Abstract: Complex valued harmonic morphisms are interesting maps that foliate their domain by minimal surfaces of co-dimension 2. In this talk we discuss the r...
25
Jun
2024
Mittagsseminar zur Arithmetik: Pol van Hoften (Amsterdam): Igusa stacks and the cohomology of Shimura varieties
Associated to a modular form f is a two-dimensional Galois representation whose Frobenius eigenvalues can be expressed in terms of the Fourier coefficients of f...
25
Jun
2024
Ebrahim Samei (Saskatoon): Entropies and Poisson boundaries of probability measures on groups with rapid decay. /
Dietmar Bisch (Vanderbilt University): Graph planar algebra embeddings and new Temperley-Lieb-Jones subfactors. Oberseminar C*-Algebren.
Ebrahim Samei, Saskatoon: Let $G$ be a countable discrete group, and let $\mu$ be a probability measure on $G$ with finite (Shannon) entropy. We initiate th...
26
Jun
2024
Art Pelling (TU Berlin): Data-driven reduced order modelling for acoustics
26
Jun
2024
Jörg Schürmann: The Kirchever construction: From Riemann surfaces to points in the Sato Grassmannian, part II (Research Seminar on Geometry, Algebra and Topology: Moduli Spaces of Complex Curves)