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We prove, for the relativistic Boltzmann equation on a Bianchi type I space-time, a global existence and uniqueness theorem, for arbitrarily large initial data.

General Relativity and Quantum Cosmology · Physics 2009-11-11 N. Noutchegueme , D. Dongo , E. Takou

The initial-boundary value problem for the two-dimensional regular four-velocity discrete Boltzmann system is analyzed in a rectangle. The existence and uniqueness of a classical global positive solution, bounded with its first partial…

Analysis of PDEs · Mathematics 2025-05-20 Koudzo Togbévi Selom Sobah , Amah Séna d'Almeida

We consider the spatially inhomogeneous Boltzmann equation without angular cutoff for soft potentials. For any given initial datum such that the mass, energy and entropy densities are bounded and the mass is away from vacuum, we establish…

Analysis of PDEs · Mathematics 2024-10-18 Ling-Bing He , Jie Ji , Wei-Xi Li

This paper establishes the global well-posedness of the Landau-Lifshitz-Baryakhtar (LLBar) equation in the whole space $\mathbb{R}^3$. The study first demonstrates the existence and uniqueness of global strong solutions using the weak…

Analysis of PDEs · Mathematics 2025-07-02 Fan Xu , Bin Liu

The global well-posedness of the Boltzmann equation with initial data of large amplitude has remained a long-standing open problem. In this paper, by developing a new $L^\infty_xL^1_{v}\cap L^\infty_{x,v}$ approach, we prove the global…

Analysis of PDEs · Mathematics 2017-04-26 Renjun Duan , Feimin Huang , Yong Wang , Tong Yang

In this paper, we study the Newtonian limit for relativistic Boltzmann equation in a periodic box $\mathbb{T}^3$. We first establish the global-in-time mild solutions of relativistic Boltzmann equation with uniform-in-$\mathfrak{c}$…

Analysis of PDEs · Mathematics 2024-02-01 Chuqi Cao , Jing Ouyang , Yong Wang , Changguo Xiao

In this paper, we provide a much simplified proof of the main result in [Lin, Xu, Zhang, arXiv:1302.5877] concerning the global existence and uniqueness of smooth solutions to the Cauchy problem for a 2D incompressible viscous and…

Analysis of PDEs · Mathematics 2014-10-24 Ting Zhang

We solve the Cauchy problem for the full non-linear homogeneous Boltzmann system of equations describing multi-component monatomic gas mixtures for binary interactions in three dimensions. More precisely, we show existence and uniqueness of…

Mathematical Physics · Physics 2020-07-29 Irene M. Gamba , Milana Pavić-Čolić

In this paper we consider the Boltzmann equation modelling the motion of a polyatomic gas where the integration collision operator in comparison with the classical one involves an additional internal energy variable $I\in\mathbb{R}_+$ and a…

Analysis of PDEs · Mathematics 2023-06-05 Renjun Duan , Zongguang Li

We prove an inequality on the Wasserstein distance with quadratic cost between two solutions of the spatially homogeneous Boltzmann equation without angular cutoff, from which we deduce some uniqueness results. In particular, we obtain a…

Analysis of PDEs · Mathematics 2009-11-13 Nicolas Fournier , Hélène Guérin

We prove the existence of a class of large global scattering solutions of Boltzmann's equation with constant collision kernel in two dimensions. These solutions are found for $L^2$ perturbations of an underlying initial data which is…

Analysis of PDEs · Mathematics 2022-10-28 Thomas Chen , Ryan Denlinger , Nataša Pavlović

In this paper, we study spatially homogeneous solutions of the Boltzmann equation in special relativity and in Robertson-Walker spacetimes. We obtain an analogue of the Povzner inequality in the relativistic case and use it to prove global…

General Relativity and Quantum Cosmology · Physics 2013-01-03 Ho Lee , Alan D. Rendall

The Cauchy problem for the inelastic Boltzmann equation is studied for small data. Existence and uniqueness of mild and weak solutions is obtained for sufficiently small data that lies in the space of functions bounded by Maxwellians. The…

Mathematical Physics · Physics 2008-04-11 Ricardo J. Alonso

We prove a global in time existence theorem, for the initial value problem for the Einstein-Boltzmann system, with arbitrarily large initial data, in the homogeneous case, in a Bianchi type I space-time

General Relativity and Quantum Cosmology · Physics 2014-11-17 Norbert Noutchegueme , David Dongo

For the Boltzmann equation with cutoff hard potentials, we construct the unique global solution converging with an exponential rate in large time to global Maxwellians not only for the specular reflection boundary condition with the bounded…

Analysis of PDEs · Mathematics 2020-11-04 Renjun Duan , Gyounghun Ko , Donghyun Lee

Under a mild Lipschitz condition we prove a theorem on the existence and uniqueness of global solutions to delay fractional differential equations. Then, we establish a result on the exponential boundedness for these solutions.

Classical Analysis and ODEs · Mathematics 2018-08-24 N. D. Cong , H. T. Tuan

In this thesis we explore S. Klainerman's proof on the global existence of small amplitude solutions to nonlinear Klein-Gordon equations in four space-time dimensions, as established in his paper from 1985. We consider initial data with…

General Mathematics · Mathematics 2025-01-08 Alessandro Massaad

We broaden the application of the $l^{2}$-decoupling theorem to the Boltzmann equation. We prove Strichartz estimates for the linear problem in the $\mathbb{T}^d$ setting. We establish space-time bilinear estimates, and hence the…

Analysis of PDEs · Mathematics 2026-05-05 Xuwen Chen , Shunlin Shen , Zhifei Zhang

We prove the existence and exponential decay of global in time strong solutions to the Boltzmann equation without any angular cut-off, i.e., for long-range interactions. We consider perturbations of the Maxwellian equilibrium states and…

Analysis of PDEs · Mathematics 2016-02-22 Philip T. Gressman , Robert M. Strain

Existence of global regular solution branches of the Boltzmann Cauchy problem with continuously differentiable data in phase space dimension $2d\geq 6$ with polynomial decay at infinity of order greater than $2d$ is proved. There are data…

Analysis of PDEs · Mathematics 2016-01-07 Jörg Kampen