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Global existence for small data Cauchy problem of semilinear wave equations with scaling invariant damping in 3-D is established in this work, assuming that the data are radial and the constant in front of the damping belongs to $[1.5, 2)$.…

Analysis of PDEs · Mathematics 2021-02-02 Ning-An Lai , Yi Zhou

We consider the conformal Einstein equations for massless collisionless gas cosmologies which admit an isotropic singularity. After developing the general theory, we restrict to spatially-homogeneous cosmologies. We show that the Cauchy…

General Relativity and Quantum Cosmology · Physics 2009-10-31 K. Anguige , K. P. Tod

The Cauchy problem is revisited for the so-called relativistic Vlasov-Poisson system in the attractive case. Global existence and uniqueness of spherical classical solutions is proved under weaker assumptions than previously used. A new…

Mathematical Physics · Physics 2009-02-06 Michael K. -H. Kiessling , A. Shadi Tahvildar-Zadeh

In this paper, we establish global strong solutions for arbitrarily large initial data to the 2D and 3D compressible Navier-Stokes-Korteweg system, also referred to as the quantum Navier-Stokes equations, originally derived by Dunn and…

Analysis of PDEs · Mathematics 2026-02-12 Xiangdi Huang , Yongteng Gu , Muxi Lei

We consider solutions to the Cauchy problem for the incompressible Euler equations satisfying several additional requirements, like the global and local energy inequalities. Using some techniques introduced in an earlier paper we show that,…

Analysis of PDEs · Mathematics 2015-05-13 Camillo De Lellis , László Székelyhidi

This paper establishes the global well-posedness of strong solutions to the nonhomogeneous magnetic B\'enard system with positive density at infinity in the whole space $\mathbb{R}^2$. More precisely, we obtain the global existence and…

Analysis of PDEs · Mathematics 2024-07-23 Jieqiong Liu

It is shown that if the system of the Euler equations has a special global in time smooth solution with the linear profile of velocity, then another solutions with Cauchy data, close in the Sobolev norm to the initial data of the given…

Analysis of PDEs · Mathematics 2007-05-23 Olga S. Rozanova

We study solutions to the Yang-Mills-Higgs equations on the maximal Cauchy development of the data given on a ball of radius $R$ in $\mathbb{R}^3$. The energy of the data could be infinite and the solution grows at most inverse polynomially…

Analysis of PDEs · Mathematics 2022-03-24 Dongyi Wei , Shiwu Yang , Pin Yu

This paper is devoted to the study of the Cauchy problem for the Boussinesq system with partial viscosity in dimension $N\geq3.$ First we prove a global existence result for data in Lorentz spaces satisfying a smallness condition which is…

Analysis of PDEs · Mathematics 2009-11-13 R. Danchin , M. Paicu

We study the Cauchy problem for the Einstein-Boltzmann system with soft potentials in a cosmological setting. We assume the Bianchi I symmetry to describe a spatially homogeneous, but anisotropic universe and consider a cosmological…

General Relativity and Quantum Cosmology · Physics 2024-08-21 Ho Lee , Ernesto Nungesser

We propose a variational approach to solve Cauchy problems for parabolic equations and systems independently of regularity theory for solutions. This produces a universal and conceptually simple construction of fundamental solution…

Analysis of PDEs · Mathematics 2023-10-09 Pascal Auscher , Moritz Egert

We study the Cauchy problem for multi-dimensional compressible radiation hydrodynamics equations with vacuum. First, we present some sufficient conditions on the blow-up of smooth solutions in multi-dimensional space. Then, we obtain the…

Mathematical Physics · Physics 2014-01-14 Yachun Li , Shengguo Zhu

In 1989, R. DiPerna and P.-L. Lions established the existence of global weak solutions to the Vlasov-Maxwell system. In the present notes we give a somewhat simplified proof of this result for the relativistic version of this system, the…

Mathematical Physics · Physics 2016-09-07 Gerhard Rein

In this paper, we prove that the existence and uniqueness of globally weak solutions to the Cauchy problem for the weakly dissipative Camassa-Holm equation in time weighted $H^1$ space. First, we derive an equivalent semi-linear system by…

Analysis of PDEs · Mathematics 2022-06-15 Zhiying Meng , Zhaoyang Yin

This paper addresses the Cauchy problem for wave equations with scale-invariant time-dependent damping and nonlinear time-derivative terms, modeled as $$\partial_{t}^2u- \Delta u +\frac{\mu}{1+t}\partial_tu= f(\partial_tu), \quad x\in…

Analysis of PDEs · Mathematics 2025-06-17 Ahmad Z. Fino , Mohamed Ali Hamza

The present paper deals with the nonhomogeneous incompressible asymmetric fluids equations in dimension $d= 2,3$. The aim is to prove the unique global solvability of the system with only bounded nonnegative initial density and $H^{1}$…

Analysis of PDEs · Mathematics 2020-10-20 Fuyi Xu , Mingxue Zhang , Liening Qiao

In this paper we discuss global existence of the solution of the Maxwell and Newton system of equations, describing the interaction of a rigid charge distribution with the electromagnetic field it generates. A unique solution is proved to…

Analysis of PDEs · Mathematics 2014-11-24 Marco Falconi

We study global well-posedness of strong solutions for the nonhomogeneous Navier-Stokes equations with density-dependent viscosity and initial density allowing vanish in $\mathbb{R}^2$. Applying a logarithmic interpolation inequality and…

Analysis of PDEs · Mathematics 2021-03-01 Xin Zhong

The authors study the Cauchy problem of the magnetohydrodynamic equations for viscous compressible barotropic flows in two or three spatial dimensions with vacuum as far field density. For two spatial dimensions, we establish the global…

Analysis of PDEs · Mathematics 2014-05-21 Boqiang Lv , Xiaoding Shi , Xinying Xu

We prove existence and uniqueness of the global solution to the Cauchy problem on a universe fireworks model with finite total mass at the initial state when the ratio of the mass surviving the explosion, the probability of the explosion of…

Mathematical Physics · Physics 2011-02-19 Zhenglu Jiang , Hongjiong Tian