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Schauder estimates for nonlocal kinetic equations and applications
Journal de Mathématiques Pures et Appliquées ( IF 2.3 ) Pub Date : 2020-06-29 , DOI: 10.1016/j.matpur.2020.06.003
Zimo Hao , Mingyan Wu , Xicheng Zhang

In this paper we develop a new method based on Littlewood-Paley's decomposition and heat kernel estimates in integral form, to establish Schauder's estimate for the following degenerate nonlocal equation in R2d with Hölder coefficients:tu=Lκ;v(α)u+bu+f,u0=0, where u=u(t,x,v) and Lκ;v(α) is a nonlocal α-stable-like operator with α(1,2) and kernel function κ, which acts on the variable v. As an application, we show the strong well-posedness to the following degenerate stochastic differential equation with Hölder drift b:dZt=b(t,Zt)dt+(0,σ(t,Zt)dLt(α)),Z0=(x,v)R2d, where Lt(α) is a d-dimensional rotationally invariant and symmetric α-stable process with α(1,2), and b:R+×R2dR2d is a (γ,β)-order Hölder continuous function in (x,v) with γ(2+α2(1+α),1) and β(1α2,1), σ:R+×R2dRdRd is a Lipschitz function. Moreover, we also show that for almost all ω, the following random transport equation has a unique Cb1-solution:tu(t,x,ω)+(b(t,x)+Lt(α)(ω))xu(t,x,ω)=0,u(0,x)=φ(x), where φCb1(Rd) and b:R+×RdRd is a bounded continuous function of (t,x) and γ-order Hölder continuous in x uniformly in t with γ(2+α2(1+α),1).



中文翻译:

非局部动力学方程的Schauder估计及其应用

在本文中,我们开发了一种基于Littlewood-Paley分解和积分形式的热核估计的新方法,以为下面的退化非局部方程建立Schauder估计。 [R2d 带有霍尔德系数:Ťü=大号κ;vαü+bü+Fü0=0 哪里 ü=üŤXv大号κ;vα是一个非局部α稳定样算子,具有α1个2以及作用于变量v的核函数κ。作为一个应用,我们证明了其对以下具有Hölder漂移b的退化随机微分方程的强适定性:džŤ=bŤžŤdŤ+0σŤžŤd大号Ťαž0=Xv[R2d 哪里 大号Ťα是一个d维旋转不变且对称的α稳定过程,具有α1个2b[R+×[R2d[R2d 是一个 γβ阶Hölder连续函数 Xvγ2+α21个+α1个β1个-α21个σ[R+×[R2d[Rd[Rd是Lipschitz函数。此外,我们还表明,对于几乎所有的ω,下面的随机输运方程都有一个唯一的Cb1个-解:ŤüŤXω+bŤX+大号ŤαωXüŤXω=0ü0X=φX 哪里 φCb1个[Rdb[R+×[Rd[Rd 是...的有界连续函数 ŤXγ阶赫尔德连续在X均匀地γ2+α21个+α1个

更新日期:2020-06-29
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