报告题目:Bifurcation structure and stability of steady gravity water waves with constant vorticity
报 告 人:代国伟教授
单 位 :大连理工大学
报告时间:2022年1月7日10:30-11:30
腾讯会议ID:146 401 371(无密码)
报告摘要:This paper studies the local bifurcation direction, stability properties and global structure for a nonlinear pseudodifferential equation, which describes the periodic traveling gravity waves at the free surface of water in a flow of constant vorticity over a flat bed. We first obtain the precise formula of the second derivative of bifurcation parameters at the bifurcation points. In particular, their signs can be strictly judged when constant vorticity vanishes. Furthermore, we present the stability analysis for the travelling water waves that have small vorticity and amplitude. We also show that the global bifurcation curves can't form a loop. Moreover, if the the total head is bounded, the existence of waves of all amplitudes from zero up to that of Stokes' highest wave has been established.
报告人简介:代国伟,大连理工大学教授,博士生导师。在分歧理论及应用方面做出了重要有趣的工作。获得了若干新的抽象分歧定理,建立了连通分支逼近法,建立了几个特征值问题的谱理论,得到了几类微分方程解集的全局结构。以第一或通讯作者身份完成SCI论文60余篇, 所发论文被引用590余次。在科学出版社出版专著1部。主持完成两项国家自然科学基金,正在承担国家自然科学基金1项(面上项目)。入选辽宁省“百千万人才工程”万层次人选。入选大连理工大学“星海学者”人才培育计划——“星海优青”工程。获省自然科学二等奖1次,高校科技进步一等奖3次、二等奖1次,辽宁省自然科学学术成果二等奖1次。2017年被评为数学物理学报优秀审稿人。
主办单位:江苏大学数学科学学院
江苏大学应用系统分析研究院