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We consider Navier-Stokes equations for compressible viscous fluids in one dimension. We prove the existence of global strong solution with large initial data for the shallow water system. The key ingredient of the proof relies to a new…

Analysis of PDEs · Mathematics 2018-04-02 Boris Haspot

We prove global well-posedness for 3D Dirac equation with a concentrated nonlinearity.

Analysis of PDEs · Mathematics 2019-08-02 Elena Kopylova

In this paper, we study diagonalizable hyperbolic systems in one space dimension. Based on a new gradient entropy estimate, we prove the global existence of a continuous solution, for large and nondecreasing initial data. Moreover, we show…

Mathematical Physics · Physics 2008-12-18 Ahmad El Hajj , Regis Monneau

We investigate an evolutive system of non-linear partial differential equations derived from Oldroyd models on Non-Newtonian flows. We prove global existence of weak solutions, in the case of a smooth bounded domain, for general initial…

Analysis of PDEs · Mathematics 2012-09-04 Olfa Bjaoui , Mohamed Majdoub

The nonhomogeneous Navier-Stokes equations with density-dependent viscosity is studied in three-dimensional (3D) exterior domains with nonslip or slip boundary conditions. We prove that the strong solutions exists globally in time provided…

Analysis of PDEs · Mathematics 2022-05-13 Guocai Cai , Boqiang Lü , Yi Peng

In this paper, we are interested in the two-dimensional Dirac-Klein-Gordon system, which is a basic model in particle physics. We investigate the global behaviors of small data solutions to this system in the case of a massive scalar field…

Analysis of PDEs · Mathematics 2022-05-25 Shijie Dong , Kuijie Li , Yue Ma , Xu Yuan

We study the Dirac--Klein-Gordon system in $1+2$ spacetime dimensions. We show global existence of the solutions, as well as sharp time decay and linear scattering. One key advance is that we provide the first asymptotic stability result…

Analysis of PDEs · Mathematics 2023-11-15 Shijie Dong , Zoe Wyatt

This article focuses on a large family of cross-diffusion systems of the form $\partial$ t U-$\Delta$A(U) = 0, in dimension d $\in$ N * , and where U $\in$ R 2. We show that under natural conditions on the nonlinearity A, those systems have…

Analysis of PDEs · Mathematics 2024-03-04 L Desvillettes , A Moussa

In this paper we study a system which is equivalent to a nonlocal version of the well known Brezis Nirenberg problem. The difficulties related with the lack of compactness are here emphasized by the nonlocal nature of the critical nonlinear…

Analysis of PDEs · Mathematics 2016-07-29 Antonio Azzollini , Pietro d'Avenia , Giusi Vaira

We prove global well-posedness below the charge norm (i.e., the $L^2$ norm of the Dirac spinor) for the Dirac-Klein-Gordon system of equations (DKG) in one space dimension. Adapting a method due to Bourgain, we split off the high frequency…

Analysis of PDEs · Mathematics 2007-05-23 Sigmund Selberg

In this paper, the authors first establish the global well-posedness of strong solutions of the simplified Ericksen-Leslie model for nonhomogeneous incompressible nematic liquid crystal flows in two dimensions if the initial data satisfies…

Analysis of PDEs · Mathematics 2012-12-03 Shengquan Liu , Jianwen Zhang

This paper concerns the Dirichlet problem of three-dimensional inhomogeneous Navier-Stokes equations with density-dependent viscosity. When the viscosity coefficient $\mu(\rho)$ is a power function of the density ($\mu(\rho)=\mu\rho^\alpha$…

Analysis of PDEs · Mathematics 2024-08-02 Xiangdi Huang , Jiaxu Li , Rong Zhang

The evolution of two partially miscible, nonhomogeneous, incompressible viscous fluids of non-Newtonian type, can be governed by the Navier-Stokes-Cahn-Hilliard system. In the present work, we prove the global existence of weak solutions…

Analysis of PDEs · Mathematics 2025-12-25 Fang Li , Duan Xingyu , Guo Zhenhua

In this paper, we study the global regularity of strong solution to the Cauchy problem of 3D incompressible Navier-Stokes equations with large data and non-zero force. We prove that the strong solution exists globally for $\nabla u\in…

Analysis of PDEs · Mathematics 2015-09-29 Abdelhafid Younsi

We consider the defocusing nonlinear Schr\"odinger equation on $\mathbb{T}^2$ with Wick ordered power nonlinearity, and prove almost sure global well-posedness with respect to the associated Gibbs measure. The heart of the matter is the…

Analysis of PDEs · Mathematics 2024-04-19 Yu Deng , Andrea R. Nahmod , Haitian Yue

We study a two fluid system which models the motion of a charged fluid with Rayleigh friction, and in the presence of an electro-magnetic field satisfying Maxwell's equations. We study the well-posdness of the system in both space…

Analysis of PDEs · Mathematics 2017-05-15 Yoshikazu Giga , Slim Ibrahim , Shengyi Shen , Tsuyoshi Yoneda

Recently, A. Gruenrock and H. Pecher proved global well-posedness of the 2d Dirac-Klein-Gordon equations given initial data for the spinor and scalar fields in $H^s$ and $H^{s+1/2} \times H^{s-1/2}$, respectively, where $s\ge 0$, but…

Analysis of PDEs · Mathematics 2011-09-26 Sigmund Selberg , Achenef Tesfahun

We study the Abels-Garcke-Gr\"un (AGG) model for a mixture of two viscous incompressible fluids with different densities. The AGG model consists of a Navier-Stokes-Cahn-Hilliard system characterized by a (non-constant)…

Analysis of PDEs · Mathematics 2020-06-24 Andrea Giorgini

In this paper, we study the global existence of solutions of the Cauchy problem for a class of weakly dissipative nonlinear dispersive wave equations…

Analysis of PDEs · Mathematics 2026-03-24 Yiyao Lian , Zhenyu Wan , Zhaoyang Yin

Local and global well - posedness of the solution to the two space dimensional Dirac equation with Hartree type nonlinearity is established with the initial datum in the space $H^s(\mathbb{R}^2, \mathbb{C}^2)$ with $s >0.$.

Analysis of PDEs · Mathematics 2020-05-15 Vladimir Georgiev , Boris Shakarov