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We study the regularity of weak solutions to nonlocal in time subdiffusion equations for a wide class of weakly singular kernels appearing in the generalised fractional derivative operator. We prove a weak Harnack inequality for nonnegative…

偏微分方程分析 · 数学 2024-09-10 Adam Kubica , Katarzyna Ryszewska , Rico Zacher

We study the long-time behaviour of a nonlinear Fokker-Planck equation, which models the evolution of rigid polymers in a given flow, after a closure approximation. The aim of this work is twofold: first, we propose a microscopic derivation…

偏微分方程分析 · 数学 2011-07-20 Lingbing He , Claude Le Bris , Tony Lelièvre

The existence and uniqueness of measure-valued solutions to stochastic nonlinear, non-local Fokker-Planck equations is proven. This type of stochastic PDE is shown to arise in the mean field limit of weakly interacting diffusions with…

概率论 · 数学 2021-03-30 Michele Coghi , Benjamin Gess

We prove local boundedness, Harnack's inequality and local regularity for weak solutions of quasilinear degenerate elliptic equations in divergence form with Rough coefficients. Degeneracy is encoded by a non-negative, symmetric, measurable…

We show that degenerate nonlinear diffusion equations can be asymptotically obtained as a limit from a class of nonlocal partial differential equations. The nonlocal equations are obtained as gradient flows of interaction-like energies…

偏微分方程分析 · 数学 2023-10-12 José Antonio Carrillo , Antonio Esposito , Jeremy Sheung-Him Wu

We extend the De Giorgi--Nash--Moser theory to a class of kinetic Fokker-Planck equations and deduce new results on the Landau-Coulomb equation. More precisely, we first study the H{\"o}lder regularity and establish a Harnack inequality for…

偏微分方程分析 · 数学 2017-02-03 F Golse , Cyril Imbert , Clément Mouhot , A Vasseur

The aim of this work is to prove a Harnack inequality and the H\"older continuity for weak solutions to the Kolmogorov equation $\mathscr{L} u = f$ with measurable coefficients, integrable lower order terms and nonzero source term. We…

偏微分方程分析 · 数学 2021-08-02 Francesca Anceschi , Annalaura Rebucci

In this paper, we study the nonlinear Vlasov-Fokker-Planck equation with fixed collision frequency. We establish the global-in-time existence of weak solutions to the equation with large initial data. Moreover, we show that our solution…

偏微分方程分析 · 数学 2024-07-18 Young-Pil Choi , Byung-Hoon Hwang , Yeongseok Yoo

We consider linear and obstacle problems driven by a nonlocal integral operator, for which nonlocal interactions are restricted to a ball of finite radius. These type of operators are used to model anomalous diffusion and, for a special…

数值分析 · 数学 2018-04-30 Olena Burkovska , Max Gunzburger

We consider kinetic Fokker-Planck (or Vlasov-Fokker-Planck) equations on the torus with Maxwellian or fat tail local equilibria. Results based on weak norms have recently been achieved by S. Armstrong and J.-C. Mourrat in case of Maxwellian…

偏微分方程分析 · 数学 2022-11-14 Giovanni Brigati

In this paper, we investigate the incompressible Navier-Stokes equations coupled with the Vlasov-Fokker-Planck equation, which describes a two-phase mixture of the viscous incompressible fluid with particles or bubbles through a frictional…

偏微分方程分析 · 数学 2026-02-04 Renjun Duan , Fengqiang Shi , Wendong Wang , Jianbo Yu

We study the boundary regularity of local weak solutions to nonlinear parabolic systems of the form \begin{equation*} \partial_t u^i - \mathrm{div} \big( a(|Du|) Du^i \big)= f^i, \qquad i=1,\dots,N, \end{equation*} in a space-time cylinder…

偏微分方程分析 · 数学 2026-01-26 Michael Strunk

This paper focuses on the study of semilinear fractional diffusion-wave equations in the context of critical nonlinearities. Firstly, we address the issue of local well-posedness for the problem, examine spatial regularity, and the…

偏微分方程分析 · 数学 2026-02-09 Masterson Costa , Claudio Cuevas , Bruno de Andrade

We obtain equilibration rates for a one-dimensional nonlocal Fokker-Planck equation with time-dependent diffusion coefficient and drift, modeling the relaxation of a large swarm of robots, feeling each other in terms of their distance,…

偏微分方程分析 · 数学 2023-06-06 Ferdinando Auricchio , Giuseppe Toscani , Mattia Zanella

In this paper we investigate the stationary profiles of a nonlinear Fokker-Planck equation with small diffusion and nonlinear in- and outflow boundary conditions. We consider corridors with a bottleneck whose width has a global…

动力系统 · 数学 2026-04-10 Annalisa Iuorio , Gaspard Jankowiak , Peter Szmolyan , Marie-Therese Wolfram

We investigate the fractional diffusion approximation of a kinetic equation in the upper-half plane with diffusive reflection conditions at the boundary. In an appropriate singular limit corresponding to small Knudsen number and long time…

偏微分方程分析 · 数学 2019-09-04 Ludovic Cesbron , Antoine Mellet , Marjolaine Puel

Short wave equations were introduced in connection with the nonlinear reflection of weak shock waves. They also relate to the modulation of a gas-fluid mixture. Khokhlov-Zabolotskaya equation are used to describe the propagation of a…

数学物理 · 物理学 2008-11-25 Xiaoping Xu

We introduce a generalized similarity analysis which grants a qualitative description of the localised solutions of any nonlinear differential equation. This procedure provides relations between amplitude, width, and velocity of the…

数学物理 · 物理学 2009-10-31 A. Ludu , G. Stoitcheva , J. P. Draayer

We study the existence of stationary solutions for a nonlocal version of the Fisher-Kolmogorov-Petrovskii-Piscounov (FKPP) equation. The main motivation is a recent study by Berestycki et {al.} [Nonlinearity 22 (2009), {pp.}~2813--2844]…

偏微分方程分析 · 数学 2015-03-06 Franz Achleitner , Christian Kuehn

We study the global existence and uniqueness of weak solutions to kinetic Kolmogorov-Vicsek models that can be considered a non-local non-linear Fokker-Planck type equation describing the dynamics of individuals with orientational…

偏微分方程分析 · 数学 2016-05-02 Irene M. Gamba , Moon-Jin Kang