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We propose a gradient flow perspective to the spatially homogeneous Landau equation for soft potentials. We construct a tailored metric on the space of probability measures based on the entropy dissipation of the Landau equation. Under this…

偏微分方程分析 · 数学 2024-05-22 José A. Carrillo , Matias G. Delgadino , Laurent Desvillettes , Jeremy S. H. Wu

We study the derivation of the spatially homogeneous Landau equation from the mean-field limit of a conservative $N$-particle system, obtained by passing to the grazing limit on Kac's walk in his program for the Boltzmann equation. Our…

偏微分方程分析 · 数学 2025-08-19 Xuanrui Feng , Zhenfu Wang

In this work, we study the Cauchy problem of the spatially homogeneous Landau equation with hard potentials in a close-to-quilibrium framework. We prove that the solution to the Cauchy problem enjoys the analytic regularizing effect of the…

偏微分方程分析 · 数学 2022-06-07 Chao-Jiang Xu , Yan Xu

In this paper we consider a modified quantum Boltzmann equation with the quantum effect measured by a continuous parameter $\delta$ that can decrease from $\delta=1$ for the Fermi-Dirac particles to $\delta=0$ for the classical particles.…

偏微分方程分析 · 数学 2022-01-25 Zongguang Li

It is expected in physics that the homogeneous quantum Boltzmann equation with Fermi-Dirac or Bose-Einstein statistics and with Maxwell-Boltzmann operator (neglecting effect of the statistics) for the weak coupled gases will converge to the…

偏微分方程分析 · 数学 2021-07-28 Ling-Bing He , Xuguang Lu , Mario Pulvirenti

We study the boundary regularity properties and derive a priori pointwise supremum estimates of weak solutions and their derivatives in terms of suitable weighted $L^2$-norms for a class of degenerate parabolic equations that satisfy…

偏微分方程分析 · 数学 2017-02-09 Charles L. Epstein , Camelia A. Pop

Motivated by the question of existence of global solutions, we obtain pointwise upper bounds for radially symmetric and monotone solutions to the homogeneous Landau equation with Coulomb potential. The estimates say that blow up in the…

偏微分方程分析 · 数学 2017-01-25 Maria Gualdani , Nestor Guillen

Numerical solutions of stationary diffusion equations on the unit sphere with isotropic lognormal diffusion coefficients are considered. H\"older regularity in $L^p$ sense for isotropic Gaussian random fields is obtained and related to the…

概率论 · 数学 2023-12-06 Lukas Herrmann , Annika Lang , Christoph Schwab

Consider the spatially inhomogeneous Landau equation with moderately soft potentials (i.e. with $\gamma \in (-2,0)$) on the whole space $\mathbb R^3$. We prove that if the initial data $f_{\mathrm{in}}$ are close to the vacuum solution…

偏微分方程分析 · 数学 2022-06-22 Jonathan Luk

In this paper, we study the global existence and uniqueness, Gaussian lower bound, and moment estimates in the spatially homogeneous Boltzmann equation for Fermi-Dirac particles for hard potential ($0\leq \gamma\leq 2$) with angular cutoff…

偏微分方程分析 · 数学 2025-11-06 Gayoung An , Sungbin Park

In the present work, we investigate estimates of regularity for weak solutions to the non-cutoff Boltzmann equation with soft potentials. We restrict our focus to the so-called "typically rough and slowly decaying data", which is…

偏微分方程分析 · 数学 2023-08-11 Ling-Bing He , Jie Ji

Consider weakly nonlinear complex Ginzburg--Landau (CGL) equation of the form: $$ u_t+i(-\Delta u+V(x)u)=\epsilon\mu\Delta u+\epsilon \mathcal{P}( u),\quad x\in {R^d}\,, \quad(*) $$ under the periodic boundary conditions, where…

偏微分方程分析 · 数学 2015-12-14 Guan Huang , Sergei Kuksin , Alberto Maiocchi

Inthispaper,westudytheCauchyproblemoftheinhomogeneous Landau equation with hard potentials under the perturbation framework to global equilibrium. We prove that the solution to the Cauchy problem enjoys the analytic Gelfand-Shilov…

偏微分方程分析 · 数学 2023-11-06 Chao-Jiang Xu , Yan Xu

Departing from the weak solution, we prove the uniqueness, smoothing estimates and the global dynamics for the non cutoff spatially homogeneous Boltzmann equation with moderate soft potentials. Our results show that the behavior of the…

偏微分方程分析 · 数学 2022-04-05 Ling-Bing He , Jie Ji

We consider the spatially inhomogeneous Landau equation in the case of very soft and Coulomb potentials, $\gamma \in [-3,-2]$. We show that solutions can be continued as long as the following three quantities remain finite, uniformly in $t$…

偏微分方程分析 · 数学 2026-02-19 Stanley Snelson , Caleb Solomon

We derive a weak-strong uniqueness and stability principle for the Landau equation in the soft potentials case (including Coulomb interactions). The distance between two solutions is measured by their relative entropy, which to our…

偏微分方程分析 · 数学 2025-05-28 Côme Tabary

This paper addresses large-data local existence and uniqueness of classical solutions to the inhomogeneous Landau equation in the hard potentials case (including Maxwell molecules). Solutions have previously been constructed by Chaturvedi…

偏微分方程分析 · 数学 2024-07-16 Stanley Snelson , Shelly Ann Taylor

In this manuscript we consider an isotropic modification for the Landau equation with Coulomb potential in three space dimensions. Global in time existence of weak solutions for even initial data is shown by employing a time…

偏微分方程分析 · 数学 2017-08-08 Maria Gualdani , Nicola Zamponi

We consider the H\"older regularity of solutions to the steady Boltzmann equation with in-flow boundary condition in bounded and strictly convex domains $\Omega\subset\mathbb{R}^{3}$ for gases with cutoff soft potential $(-3<\gamma<0)$. We…

偏微分方程分析 · 数学 2024-09-27 Kung-Chien Wu , Kuan-Hsiang Wang

We investigate linear parabolic equations in divergence form with singular coefficients and non-smooth boundary data. When the diffusion, drift, or potential terms, as well as the initial or boundary conditions, are distributions rather…

偏微分方程分析 · 数学 2026-02-10 Arshyn Altybay , Alibek Yeskermessuly