Klaus Widmayer

collaborators

9 papers

math.PR2026

An effective energy-enstrophy diffusion process with a condensation bound

Alain-Sol Sznitman, Klaus Widmayer

We use Gaussian measure on $R^{N}$ to define the coefficients of an elliptic diffusion and show that it lives in an open cone of $R^{2}$ . One component represents ens…

math.PR2026

An inviscid limit to an effective energy-enstrophy diffusion process

Alain-Sol Sznitman, Klaus Widmayer

In this article we consider a stationary $N$ -dimensional Galerkin-Navier-Stokes type evolution with Brownian forcing and random stirring (of arbitrarily small strength that plays t…

math.AP2026

Global dynamics in the 3D pressureless Euler-Poisson system for ions

Lucas Ertzbischoff, Catalina Jurja, Klaus Widmayer

In this work we consider the pressureless Euler-Poisson system on $R^{3}$ describing ion dynamics, which is a common model in the study of cold plasma. We prove global regul…

math.AP2026

Long-time stability of a stably stratified rest state in the inviscid 2D Boussinesq equation

Catalina Jurja, Klaus Widmayer

We establish the nonlinear stability on a timescale $O (ε^{- 2})$ of a linearly, stably stratified rest state in the inviscid Boussinesq system on $R^{2}$ . Here $\va…

math.AP2026

Increased lifespan for 3D compressible Euler flows with rotation

Haram Ko, Benoit Pausader, Ryo Takada +1

We consider the compressible Euler equation with a Coriolis term and prove a lower bound on the time of existence of solutions in terms of the speed of rotation, sound speed and si…

math.AP2026

On the stability of vacuum in the screened Vlasov-Poisson equation

Mikaela Iacobelli, Stefano Rossi, Klaus Widmayer

We study the asymptotic behavior of small data solutions to the screened Vlasov-Poisson equation on $R^{d} \times R^{d}$ near vacuum. We show that for dimensions $d\geq…