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The interest in the Camassa-Holm equation inspired the search for various generalizations of this equation with interesting properties and applications. In this letter we deal with such a two-component integrable system of coupled…

Exactly Solvable and Integrable Systems · Physics 2009-07-14 Adrian Constantin , Rossen I. Ivanov

In this paper we mainly investigate the periodic $\mu$-Camassa-Holm equation. We show the existence of global conservative solutions to the Cauchy problem of the periodic $\mu$-Camassa-Holm equation. The result is obtained by introducing a…

Analysis of PDEs · Mathematics 2024-06-19 Wei Luo , Zhaoyang Yin

We show that the Cauchy problem for the Camassa-Holm equation has a unique, global, weak, and dissipative solution for any initial data $u_0\in H^1(\mathbb{R})$, such that $u_{0,x}$ is bounded from above almost everywhere. In particular, we…

Analysis of PDEs · Mathematics 2024-08-28 Katrin Grunert

We study global-in-time well-posedness and the behaviour and of the solution to Cauchy problem in the classical Keller-Segel system with logistic term \begin{equation*} \left. \aligned \partial_tn-\Delta n=&-\chi\nabla\cdot(n\nabla c)+\la…

Analysis of PDEs · Mathematics 2022-01-06 Yao Nie , Xiaoxin Zheng

We consider the Cauchy problem to the two-dimensional incompressible liquid crystal equation and the heat flows of harmonic maps equation. Under a natural geometric angle condition, we give a new proof of the global well-posedness of smooth…

Analysis of PDEs · Mathematics 2012-10-08 Zhen Lei , Dong Li , Xiaoyi Zhang

Brief account of results on the Cauchy problem for the Einstein equations starting with early the works of Darmois and Lichnerowicz and going up to the proofs of the existence and uniqueness of solutions global in space and local in time,…

General Relativity and Quantum Cosmology · Physics 2014-10-15 Yvonne Choquet-Bruhat

In this paper, we mainly consider the Cauchy problem of a weakly dissipative Camassa-Holm equation. We first establish the local well-posedness of equation in Besov spaces $B^{s}_{p,r}$ with $s>1+\frac 1 p$ and $s=1+\frac 1 p , r=1,p\in…

Analysis of PDEs · Mathematics 2022-06-13 Zhiying Meng , Zhaoyang Yin

In this paper, we prove the global Hadamard well-posedness of strong solutions to a non-isospectral two-component cubic Camassa-Holm system in the critical Besov space $B_{2,1}^{\frac{1}{2}}(\mathbb{T})$. Our results shows that in…

Analysis of PDEs · Mathematics 2020-03-23 Lei Zhang , Zhijun Qiao

In this paper, we consider the Cauchy problem for the fractional Camassa-Holm equation which models the propagation of small-but-finite amplitude long unidirectional waves in a nonlocally and nonlinearly elastic medium. Using Kato's…

Analysis of PDEs · Mathematics 2018-07-12 Nilay Duruk Mutlubas

Consideration in the present paper is the existence of global solutions for the modified Camassa-Holm (mCH) equation with a nonzero background initial value. The mCH equation is completely integrable and can be considered as a model for the…

Analysis of PDEs · Mathematics 2023-06-01 Yiling Yang , Engui Fan , Yue Liu

These lectures are designed to provide a general introduction to the Einstein-Vlasov system and to the global Cauchy problem for these equations. To start with some general facts are collected and a local existence theorem for the Cauchy…

General Relativity and Quantum Cosmology · Physics 2007-05-23 Alan D. Rendall

This article is a guide to the literature on existence theorems for the Einstein equations which also draws attention to open problems in the field. The local in time Cauchy problem, which is relatively well understood, is treated first.…

General Relativity and Quantum Cosmology · Physics 2016-10-19 Alan D. Rendall

In this paper, we provide a much simplified proof of the main result in [Lin and Zhang, Comm. Pure Appl. Math.,67(2014), 531--580] concerning the global existence and uniqueness of smooth solutions to the Cauchy problem for a 3D…

Analysis of PDEs · Mathematics 2015-06-19 Fanghua Lin , Ting Zhang

In this paper, we study a generalized Camassa-Holm (gCH) model with both dissipation and dispersion, which has (N + 1)-order nonlinearities and includes the following three integrable equations: the Camassa-Holm, the Degasperis-Procesi, and…

Mathematical Physics · Physics 2015-11-12 Qiaoyi Hu , Zhijun Qiao

In this paper, we consider the Cauchy problems for the time-space fractional coupled chemotaxis-fluid equations, which is a generalized form of the coupled chemotaxis-fluid equations studied in \cite{M.H. Yang}. In contrast to \cite{M.H.…

Analysis of PDEs · Mathematics 2025-08-05 Yong Zhen Yang , Yong Zhou , Xiao Lin Liu

We prove that the Cauchy problem for the Chern-Simons-Higgs equations on the (2+1)-dimensional Minkowski space-time is globally well posed for initial data with finite energy. This improves a result of Chae and Choe, who proved global…

Analysis of PDEs · Mathematics 2012-01-05 Sigmund Selberg , Achenef Tesfahun

A global solvability result of the Cauchy problem of the two-species Vlasov-Maxwell-Landau system near a given global Maxwellian is established by employing an approach different than that of [5]. Compared with that of [5], the minimal…

Analysis of PDEs · Mathematics 2013-09-26 Yuanjie Lei , Huijiang Zhao

The main goal of this work consists in showing that the analytic solutions for a class of characteristic problems for the Einstein vacuum equations have an existence region larger than the one provided by the Cauchy-Kowalevski theorem due…

General Relativity and Quantum Cosmology · Physics 2015-05-27 Giulio Caciotta , Francesco Nicolò

We study global conservative solutions of the Cauchy problem for the Camassa-Holm equation $u_t-u_{txx}+\kappa u_x+3uu_x-2u_xu_{xx}-uu_{xxx}=0$ with nonvanishing and distinct spatial asymptotics.

Analysis of PDEs · Mathematics 2022-01-17 Katrin Grunert , Helge Holden , Xavier Raynaud

In this paper, we develop a Riemann-Hilbert (RH) approach to the Cauchy problem for the two-component modified Camassa-Holm (2-mCH) equation based on its Lax pair. Further via a series of deformations to the RH problem by using the…

Mathematical Physics · Physics 2024-08-28 Kai Xu , Luman Ju , Engui Fan