学 术 报 告
报告题目: Long-time asymptotics for the focusing Fokas-Lenells equation in the solitonic region of space-time
报告时间:2021年12月30日(周四) 晚上7:30-9:30
报告地点:数学学院 B303
主讲专家:范恩贵 教授/博导 复旦大学
报告摘要:Abstract. We study the long-time asymptotic behavior of the focusing Fokas-Lenells (FL) equation with generic initial data in a Sobolev space which supports bright soliton solutions. Based on the Riemann-Hilbert problem for the initial value problem of the focusing FL equation, we show that inside any fixed time-spatial cone,the long-time asymptotic behavior of the solution for the focusing FL equation can be characterized with an N-soliton on discrete spectrums and a leading order term O(t^{-1/2}) on continuous spectrum up to a residual error orderO(t^{-3/4}).
专家介绍:范恩贵,男,复旦大学数学科学学院教授,博士生导师。1999年于大连理工大学获博士学位并进入复旦大学博士后流动站工作,师从谷超豪院士。主要从事可积系统,正交多项式和随机矩阵方面的研究工作,在SIAM J. Math. Anal.,Phys. Rev. E,J. Differ. Equs.等重要期刊发表论文100余篇,被SCI刊源他引3000余次。先后主持和参与多项国家自然科学基金面上项目、重点项目。曾获教育部自然科学二等奖,上海市自然科学二等奖,上海市曙光学者称号,谷超豪数学奖。