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We introduce a practical criterion that justifies the propagation and appearance of $L^{p}$-norms for the solutions to the spatially homogeneous Boltzmann equation with very soft potentials without cutoff. Such criterion also provides a new…

Analysis of PDEs · Mathematics 2025-06-30 Ricardo J. Alonso , Pierre Gervais , Bertrand Lods

In this paper we consider the Cauchy problem on the angular cutoff Boltzmann equation near global Maxwillians for soft potentials either in the whole space or in the torus. We establish the existence of global unique mild solutions in the…

Analysis of PDEs · Mathematics 2021-09-03 Zongguang Li

We derive the 3D spatially homogeneous Boltzmann's equation with moderately soft potentials and singular angular interaction, from an interacting particles system. The collision kernel is of the form $B(z,\sigma)=|z|^{\gamma}b\left(…

Analysis of PDEs · Mathematics 2020-12-11 Samir Salem

This article studies the Cauchy problem for the Boltzmann equation with stochastic kinetic transport. Under a cut-off assumption on the collision kernel and a coloring hypothesis for the noise coefficients, we prove the global existence of…

Probability · Mathematics 2018-03-01 Samuel Punshon-Smith , Scott Smith

We prove existence, uniqueness and regularity of weak solutions of Kolmogorov--Fokker--Planck equations with either local or non-local diffusion in the velocity variable and rough diffusion coefficients or kernels. Our results cover the…

Analysis of PDEs · Mathematics 2025-12-10 Pascal Auscher , Cyril Imbert , Lukas Niebel

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…

Analysis of PDEs · Mathematics 2023-08-11 Ling-Bing He , Jie Ji

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

We study the existence and qualitative properties of solutions to the Cauchy problem associated to the quasilinear reaction-diffusion equation $$ \partial_tu=\Delta u^m+(1+|x|)^{\sigma}u^p, $$ posed for $(x,t)\in\real^N\times(0,\infty)$,…

Analysis of PDEs · Mathematics 2023-06-16 Razvan Gabriel Iagar , Ana Isabel Muñoz , Ariel Sánchez

In this paper, we deal with (angular cut-off) Boltzmann equation with soft potential ($-3<\gamma<0$). In particular, we construct a unique global solution in $L^\infty_{x,v}$ which converges to global equilibrium asymptotically provided…

Analysis of PDEs · Mathematics 2021-11-16 Gyounghun Ko , Donghyun Lee , Kwanghyuk Park

In this paper we study the Boltzmann equation near global Maxwellians in the $d$-dimensional whole space. A unique global-in-time mild solution to the Cauchy problem of the equation is established in a Chemin-Lerner type space with respect…

Analysis of PDEs · Mathematics 2017-12-06 Renjun Duan , Shota Sakamoto

In this article, the existence of mass-conserving solutions is investigated to the continuous coagulation and collisional breakage equation with singular coagulation kernels. Here, the probability distribution function attains singularity…

Analysis of PDEs · Mathematics 2019-11-04 Prasanta Kumar Barik , Ankik Kumar Giri , Rajesh Kumar

We prove the unique existence and exponential decay of global in time classical solutions to the special relativistic Boltzmann equation without any angular cut-off assumptions with initial perturbations in some weighted Sobolev spaces. We…

Analysis of PDEs · Mathematics 2021-02-19 Jin Woo Jang

Given a Hilbert space, we investigate the well-posedness of the Cauchy problem for the wave equation for operators with discrete non-negative spectrum acting on it. We consider the cases when the time-dependent propagation speed is regular,…

Analysis of PDEs · Mathematics 2017-10-17 Michael Ruzhansky , Niyaz Tokmagambetov

An important physical model describing the dynamics of dilute weakly ionized plasmas in the collisional kinetic theory is the Vlasov-Poisson-Boltzmann system for which the plasma responds strongly to the self-consistent electrostatic force.…

Analysis of PDEs · Mathematics 2012-03-20 Renjun Duan , Tong Yang , Huijiang Zhao

We consider a Cauchy problem for the inhomogeneous differential equation given in terms of an unbounded linear operator $A$ and the Caputo fractional derivative of order $\alpha \in (0, 2)$ in time. The previously known representation of…

Numerical Analysis · Mathematics 2025-04-10 Dmytro Sytnyk , Barbara Wohlmuth

In [L. Liu and S. Jin, Multiscale Model. Simult., 16, 1085-1114, 2018], spectral convergence and long-time decay of the numerical solution towards the global equilibrium of the stochastic Galerkin approximation for the Boltzmann equation…

Analysis of PDEs · Mathematics 2019-01-30 Esther S. Daus , Shi Jin , Liu Liu

We consider the random Cauchy problem for the fully nonlocal telegraph equation of power type with the general $(\mathcal{PC}^{\ast})$ type kernel $(a,b)$. This equation can effectively characterize high-frequency signal transmission in…

Analysis of PDEs · Mathematics 2025-11-04 Xi Huang , Li Peng , Juan Carlos Pozo , Yong Zhou

This paper proves the existence of small-amplitude global-in-time unique mild solutions to both the Landau equation including the Coulomb potential and the Boltzmann equation without angular cutoff. Since the well-known works (Guo, 2002)…

Analysis of PDEs · Mathematics 2020-09-18 Renjun Duan , Shuangqian Liu , Shota Sakamoto , Robert M. Strain

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…

Analysis of PDEs · Mathematics 2025-11-06 Gayoung An , Sungbin Park

We study a regularity property for the gain part of the relativistic Boltzmann collision operator. Our assumptions on the collisional scattering kernel cover the full range of generic hard and soft potentials with angular cut-off.

Analysis of PDEs · Mathematics 2018-08-31 Jin Woo Jang , Seok-Bae Yun