一楼一凤

Global well-posedness of the defocusing, cubic nonlinear wave equation outside of the ball with radial data

活动时间:2026-04-16 09:45

活动地点:二号学院楼2432

主讲人:徐桂香

主讲人简介:

徐桂香,北京师范大学教授。2006年博士毕业于中国工程物理研究院北京研究生部。主要利用现代分析研究非线性色散波方程解的长时间动力学行为。目前主持国自然面上项目一项,参与国自然重点项目一项,先后发表50余篇学术论文,2023年与苗长兴研究员、郑继强研究员在科学出版社现代数学基础丛书出版一部专著。曾获中物院科技创新奖一等奖。多次应邀出访美、法、日、意大利和香港等进行学术交流与合作。 

活动内容摘要:

We consider the defocusing, cubic nonlinear wave equation with zero Dirichlet boundary value in the exterior $\Omega = R^3\backslash \bar{ B}(0,1)$. We make use of the distorted Fourier transform to establish the dispersive estimate and the global-in-time (endpoint) Strichartz estimate of the linear wave equation outside of the  ball with radial data. As an application, we combine Bourgain's Fourier truncation method with the energy method to show global well-posedness of radial solution to the defoucusing, cubic nonlinear wave equation outside of a ball in lower regularity Sobolev space.  

主持人:查冬兵