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We consider the defocusing energy-critical NLS in the exterior of the unit ball in three dimensions. For the initial value problem with Dirichlet boundary condition we prove global well-posedness and scattering with large radial initial…

Analysis of PDEs · Mathematics 2011-09-21 Dong Li , Hart Smith , Xiaoyi Zhang

We prove global well-posedness and scattering for the 3D Klein-Gordon-Schr\"odinger system for small radial data in the best known global well-posedness range $(u_0, n_0, n_1)\in L^2\times H^{ -\frac{1}{2} + \epsilon } \times…

Analysis of PDEs · Mathematics 2026-04-14 Vitor Borges , Tiklung Chan

We study the global well-posedness of the two-dimensional defocusing fourth-order Schr\"odinger initial value problem with power type nonlinearities $\vert u\vert^{2k}u$ where $k$ is a positive integer. By using the $I$-method, we prove…

Analysis of PDEs · Mathematics 2023-08-14 Engin Başakoğlu , Barış Yeşiloğlu , Oğuz Yılmaz

We consider the energy-critical defocusing nonlinear wave equation on $\mathbb{R}^4$ and establish almost sure global existence and scattering for randomized radially symmetric initial data in $H^s_x(\mathbb{R}^4) \times…

Analysis of PDEs · Mathematics 2018-02-13 Benjamin Dodson , Jonas Luhrmann , Dana Mendelson

In this paper we prove that the energy - critical nonlinear Schr{\"o}dinger equation in the domain exterior to a convex obstacle is globally well - posed and scattering for initial data having finite energy. To prove this we utilize…

Analysis of PDEs · Mathematics 2012-05-15 Benjamin Dodson

In this paper, we investigate the global well-posedness and scattering theory for the defocusing energy supcritical inhomogeneous nonlinear Schr\"odinger equation $iu_t + \Delta u =|x|^{-b} |u|^\alpha u$ in four space dimension, where $s_c…

Analysis of PDEs · Mathematics 2025-05-12 Xuan Liu , Chengbin Xu

We study the two-dimensional wave equation with cubic nonlinearity posed on $\mathbb R^2$, with space-time white noise forcing. After a suitable renormalisation of the nonlinearity, we prove global well-posedness for this equation for…

Analysis of PDEs · Mathematics 2021-09-07 Leonardo Tolomeo

In this paper, we study the well-posedness theory and the scattering asymptotics for the energy-critical, Schr\"odinger equation with general nonlinearity \begin{equation*} \left\{\begin{array}{l} i \partial_t u+\Delta u + f(u)=0,\ (x, t)…

Analysis of PDEs · Mathematics 2024-06-18 Jun Wang , Zhaoyang Yin

This paper is concerned with the Cauchy problem of the quadratic nonlinear Schr\"{o}dinger equation in $\mathbb{R} \times \mathbb{R}^2$ with the nonlinearity $\eta |u|^2$ where $\eta \in \mathbb{C} \setminus \{0\}$ and low regularity…

Analysis of PDEs · Mathematics 2022-09-27 Hiroyuki Hirayama , Shinya Kinoshita , Mamoru Okamoto

We establish global well-posedness and scattering for solutions to the mass-critical nonlinear Hartree equation $iu_t+\Delta u=\pm(|x|^{-2}*|u|^2)u$ for large spherically symmetric $L^2_x(\Bbb{R}^d)$ initial data; in the focusing case we…

Analysis of PDEs · Mathematics 2009-01-11 Changxing Miao , Guixiang Xu , Lifeng Zhao

In this paper, we investigate the global behaviors of solutions to defocusing semilinear wave equations in $\mathbb{R}^{1+d}$ with $d\geq 3$. We prove that in the energy space the solution verifies the integrated local energy decay…

Analysis of PDEs · Mathematics 2019-08-05 Shiwu Yang

In this paper we study the Cauchy problem for the elliptic and non-elliptic derivative nonlinear Schr\"odinger equations in higher spatial dimensions ($n\geq 2$) and some global well-posedness results with small initial data in critical…

Analysis of PDEs · Mathematics 2010-06-14 Baoxiang Wang , Yuzhao Wang

We prove global well-posedness for the defocusing cubic wave equation with data in $H^{s} \times H^{s-1}$, $1>s>{13/18}$. The main task is to estimate the variation of an almost conserved quantity on an arbitrary long time interval. We…

Analysis of PDEs · Mathematics 2017-06-19 Tristan Roy

We consider the Cauchy problem associated to the recently derived higher order hamiltonian model for unidirectional water waves and prove global existence for given data in the Sobolev space $H^s$, $s\geq 1$. We also prove an ill-posedness…

Analysis of PDEs · Mathematics 2019-06-27 Mahendra Panthee , Xavier Carvajal

For $n\geq 3$, we study the Cauchy problem for the fourth order nonlinear Schr\"{o}dinger equations, for which the existence of the scattering operators and the global well-posedness of solutions with small data in Besov spaces…

Analysis of PDEs · Mathematics 2008-10-29 Hua Zhang

We consider the cubic non-linear Schr\"odinger equation on general closed (compact without boundary) Riemannian surfaces. The problem is known to be locally well-posed in $H^s(M)$ for $s>1/2$. Global well-posedness for $s\geq 1$ follows…

Analysis of PDEs · Mathematics 2011-11-17 Zaher Hani

In this work, we consider the energy-supercritical defocusing cubic nonlinear wave equation in dimension d=5 for radially symmetric initial data. We prove that an a priori bound in the critical space implies global well-posedness and…

Analysis of PDEs · Mathematics 2015-07-22 Aynur Bulut

This paper is dedicated to the study of the derivative nonlinear Schr\"odinger equation on the real line. The local well-posedness of this equation in the Sobolev spaces is well understood since a couple of decades, while the global…

Analysis of PDEs · Mathematics 2020-12-04 Hajer Bahouri , Galina Perelman

This article is devoted to a general class of one dimensional NLS problems with a cubic nonlinearity. The question of obtaining scattering, global in time solutions for such problems has attracted a lot of attention in recent years, and…

Analysis of PDEs · Mathematics 2023-10-30 Mihaela Ifrim , Daniel Tataru

In this paper, we consider the question of the global well-posedness and scattering for the cubic Klein-Gordon equation $u_{tt}-\Delta u+u+|u|^2u=0$ in dimension $d\geq5$. We show that if the solution $u$ is apriorily bounded in the…

Analysis of PDEs · Mathematics 2017-03-07 Changxing Miao , Jiqiang Zheng