(Joint work with D. Fratila) Motivated by the study of algebraic classes in mixed characteristic, we define a countable subalgebra of ${\Bbb Q}_p$ which we call the algebra of “Andre’s p-adic periods”. We will explain the analogy and the difference…
Eventi
Applications of AAA Rational Approximation – Lloyd N. Trefethen (Mathematical Institute, University of Oxford)
For the first time, a method has recently become available for fast computation of near-best rational approximations on arbitrary sets in the real line or complex plane: the AAA algorithm (Nakatsukasa-Sete-T. 2018). We will present the algorithm and…
Winter School “Geometry, Algebra and Combinatorics of Moduli Spaces and Configurations V”
Attractors of dual continued fractions – Giovanni Panti
Given a Farey-type map F with full branches in the extended Hecke group Gamma_m, its dual F_# results from constructing the natural extension of F, letting time go backwards, and projecting. Although numerical simulations may suggest otherwise, we…
Horocycle flows on Abelian covers of hyperbolic surfaces – Davide Ravotti (Universität Wien)
The horocycle flow on the unit tangent bundle of a surface of constant negative curvature is the unit speed translation…
Accelerate Sampling Using Birth-Death Dynamics – Lihan Wang (Carnegie Mellon University, Max Planck Institute Leipzig)
In this talk, I will discuss the birth-death dynamics for sampling multimodal probability distributions, which is the spherical Hellinger gradient…
Matrix Whittaker processes – Elia Bisi (TU Wien)
Our journey starts from interacting random walks with push-and-block dynamics. We then consider their positive temperature analogues, touching upon polymer…
Convergence rates and CLT for stochastic inviscid Leray-model with transport noise – Dejun Luo (Chinese Academy of Science)
Seminario SPASS: Dejun Luo…
Nikodym-type spherical maximal functions – Alan Chang (Princeton University)
We study $L^p$ bounds on Nikodym maximal functions associated to spheres. In contrast to the spherical maximal functions studied by Stein and Bourgain, our maximal functions are uncentered: for each point in $\mathbb R^n$, we take the supremum over…
Lafforgue variety and $p$-adic representations – Kostas I. Psaromiligkos (University of Chicago)
We will construct the Lafforgue variety, a parametrizing space for the smooth irreducible representations of a $p$-adic reductive group $G(F)$. Our main tools will be Hecke algebras and a noncommutative version of the Hilbert scheme. The Lafforgue…