Marc Rouveyrol (Univ. Paris-Saclay)
Abstract: Spectral inequalities consist in bounding the norm of spectrally localized functions by their norm on a smaller, so-called "sensor" set, up to some factor depending on their frequency bound....
mehr erfahrenSeung uk Jang (Université de Rennes)
Abstract: In this talk, we focus on the spectrum of the discrete Schrödinger equation with a quasi-periodic potential called Sturmianpotential. Eigenvector problem with a Sturmian potential is associa...
mehr erfahrenLaurent Raymond (Marseille)
Abstract: With the recent publication of a solution of the the so-called « dry ten martinis problem », closing an old conjecture about the gap-labeling of of calls of aperiodic Schrödinger operators...
mehr erfahrenRemy Dubertrand (Northumbria university, UK)
Abstract: CAT maps (for Continuous Automorphisms on the Torus) are known as one family of chaotic systems. They have been intensively used to study the quantum/classical correspondence. In the last...
mehr erfahrenMiguel Donoso Echenique (UC Chile)
Abstract: We review the property of periodic approximations (PA) for groups, and generalize some results to semigroups. In order to do this, we develop the tool of natural extensions, dealing with...
mehr erfahrenSimon Puchert (Jena)
Abstract: The subject of nonlinear Dirichlet forms is rather new and as such, still has many simple open questions. In this talk, we will establish a new characterization that more closely resembles...
mehr erfahrenGiulia Meglioli (Bielefeld)
Abstract: The talk is concerned with uniqueness of solutions to a class of heat equations with positive density posed on infinite weighted graphs. We separately consider the case when the density is...
mehr erfahrenTao Wang (Fudan University Shanghai)
Abstract: In this talk, we introduce Cheeger type constants via isocapacitary constants introduced by Maz'ya to estimate first Dirichlet, Neumann and Steklov eigenvalues on a finite subgraph of a...
mehr erfahrenFlorentin Münch (Universität Leipzig)
Abstract: In this talk, we prove that every salami has exactly two ends. As is well known to experts, a salami is a weighted graph with non-negative Ollivier Ricci curvature with at least two ends of...
mehr erfahrenAlexandro Luna (UCI)
Abstract: We prove that the Hausdorff dimension of the spectrum of a Sturmian Hamiltonian of bounded type tends to one as the coupling constant tends to zero. We give a sketch of the proof which...
mehr erfahrenHaonan Zhang (University of South Carolina)
Abstract: Recently, Eldan and Gross developed a stochastic analysis approach to proving functional inequalities on discrete hypercubes. Motivated by a conjecture of Talagrand, one of their main...
mehr erfahrenChristopher Cedzich (Düsseldorf)
Abstract: In this talk, we introduce the unitary almost-Mathieu operator (UAMO) and discuss its connections to several model systems in physics and mathematics. We draw parallels to the self-adjoint...
mehr erfahrenDavid Fajman (Universität Wien)
Abstract:
Fluids are generally known to form shocks in finite time from small inhomogeneities. When the fluid evolves in an expanding spacetime, as in standard cosmology,
the expansion of spacetime...
mehr erfahrenSven Gnutzmann
Abstract: Given an arbitrary Hermitian matrix, considered as a finite discrete quantum Hamiltonian, we use methods from graph and ergodic theories to construct a corresponding unitary scattering...
mehr erfahrenMatthias Täufer (Hagen)
Abstract: We speak about the heat content at time t on metric graphs. This quantity measures how much mass of a constant initial configuration remains in the graph at time t under the action of the...
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