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In this work, we study the spatially inhomogeneous Kac equation with a non-cutoff cross section in a setting close to equilibrium. We prove that the solution to the Cauchy problem exhibits a sharp Gevrey-Gelfand-Shilov smoothing effect with…

Analysis of PDEs · Mathematics 2025-12-10 Xinzhi Cai , Hongmei Cao , Chao-jiang Xu

In this work, we investigate the Cauchy problem for the spatially inhomogeneous non-cutoff Kac equation. If the initial datum belongs to the spatially critical Besov space, we can prove the well-posedness of weak solution under a…

Analysis of PDEs · Mathematics 2019-02-19 Hongmei Cao , Hao-Guang Li , Chao-Jiang Xu , Jiang Xu

In this article we study the Gevrey regularization effect for the spatially inhomogeneous Boltzmann equation without angular cutoff. This equation is partially elliptic in the velocity direction and degenerates in the spatial variable. We…

Analysis of PDEs · Mathematics 2018-06-01 Hua Chen , Xin Hu , Wei-Xi Li , Jinpeng Zhan

In this paper we study the Gevrey regularity for the weak solutions to the Cauchy problem of the non-cutoff spatially homogeneous Botlzmann equation for the Maxwellian molecules model with the singularity exponent $s\in (0,1)$. We establish…

Analysis of PDEs · Mathematics 2013-12-23 Teng-Fei Zhang , Zhaoyang Yin

We consider the spatially inhomogeneous non-cutoff Kac's model of the Boltzmann equation. We prove that the Cauchy problem for the fluctuation around the Maxwellian distribution enjoys Gelfand-Shilov regularizing properties with respect to…

Analysis of PDEs · Mathematics 2015-03-23 Yoshinori Morimoto , Nicolas Lerner , Karel Pravda-Starov , Chao-Jiang Xu

It has long been suspected that the non-cutoff Boltzmann operator has similar coercivity properties as a fractional Laplacian. This has led to the hope that the homogenous Boltzmann equation enjoys similar regularity properties as the heat…

Analysis of PDEs · Mathematics 2017-07-24 Jean-Marie Barbaroux , Dirk Hundertmark , Tobias Ried , Semjon Vugalter

In this paper, we consider a class of spatially homogeneous Boltzmann equation without angular cutoff. We prove that any radial symmetric weak solution of the Cauchy problem become analytic for positive time.

Analysis of PDEs · Mathematics 2012-06-06 Léo Glangetas , Mohamed Najeme

In this work, we study the nonlinear spatially homogeneous Lan-dau equation with Maxwellian molecules, by using the spectral analysis, we show that the non linear Landau operators is almost linear, and we prove the existence of weak…

Analysis of PDEs · Mathematics 2017-08-23 Hao-Guang Li , Chao-Jiang Xu

In this paper, we study the Cauchy problem for radially symmetric homogeneous non-cutoff Boltzmann equation with Maxwellian molecules, the initial datum belongs to Shubin space of the negative index which can be characterized by spectral…

Analysis of PDEs · Mathematics 2017-02-23 Hao-Guang Li , Chao-Jiang Xu

In this work, we study the Cauchy problem for the spatially homogeneous non-cutoff Boltzamnn equation with Maxwellian molecules. We prove that this Cauchy problem enjoys Gelfand-Shilov regularizing effect, that means the smoothing…

Analysis of PDEs · Mathematics 2015-11-18 Leo Glangetas , Hao-Guang Li , Chao-Jiang Xu

It is well known that the Prandtl boundary layer equation is instable, and the well-posedness in Sobolev space for the Cauchy problem is an open problem. Recently, under the Oleinik's monotonicity assumption for the initial datum, [1] have…

Analysis of PDEs · Mathematics 2015-05-28 Weixi Li , Di Wu , Chao-Jiang Xu

We study the Cauchy problem of the spatially homogenous fractional Kramers-Fokker-Planck equation and show that the solution enjoys Gevrey regularity and decay estimation with an L2 initial datum for positive time.

Analysis of PDEs · Mathematics 2023-05-16 Chao-Jiang Xu , Yan Xu

In the paper, for the Cauchy problem on the non-cutoff Boltzmann equation in torus, we establish the global-in-time Gevrey smoothness in velocity and space variables for a class of low-regularity mild solutions near Maxwellians with the…

Analysis of PDEs · Mathematics 2021-05-04 Renjun Duan , Wei-Xi Li , Lvqiao Liu

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…

Analysis of PDEs · Mathematics 2022-06-07 Chao-Jiang Xu , Yan Xu

In this paper we show the Gevrey regularizing effect of solutions to the non-cutoff spatially homogeneous and inhomogeneous Boltzmann equation for a particular soft potential with critical singularity s=1/2.

Analysis of PDEs · Mathematics 2013-12-23 Teng-Fei Zhang , Zhaoyang Yin

In this paper we consider the non-cutoff Boltzmann equation in spatially inhomogeneous case. We prove the propagation of Gevrey regularity for the so-called smooth Maxwellian decay solutions to the Cauchy problem of spatially inhomogeneous…

Analysis of PDEs · Mathematics 2013-12-19 Teng-Fei Zhang , Zhaoyang Yin

In this work, we study the nonlinear spatially homogeneous Landau equation with hard potential in a close-to-equilibrium framework, we show that the solution to the Cauchy problem with $L^2$ initial datum enjoys a analytic Gelfand-Shilov…

Analysis of PDEs · Mathematics 2022-05-24 Hao-Guang Li , Chao-Jiang Xu

We consider the Cauchy problem for inhomogeneous linear moment differential equations with holomorphic time dependent coefficients. Using such tools as the formal norms, theory of majorants and the properties of the Newton polygon, we…

Analysis of PDEs · Mathematics 2019-11-28 Sławomir Michalik , Maria Suwińska

In this paper, we consider the spatially homogeneous Boltzmann equation without angular cutoff. We prove that every $L^1$ weak solution to the Cauchy problem with finite moments of all order acquires the $C^\infty$ regularity in the…

Analysis of PDEs · Mathematics 2015-01-14 Radjesvarane Alexandre , Yoshinori Morimoto , Seiji Ukai , Chao-Jiang Xu , Tong Yang

This paper studies the Cauchy problem for the spatially inhomogeneous Landau equation with soft potential in the perturbative framework around the Maxwellian distribution. Under a smallness assumption on the initial datum with exponential…

Analysis of PDEs · Mathematics 2025-04-17 Xiao-Dong Cao , Chao-Jiang Xu , Yan Xu
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