Critical mass for supercritical Keller-Segel systems
科研大讨论系列报告
报告题目(Title):Critical mass for supercritical Keller-Segel systems
报告人(Speaker):李玉祥 教授(东南大学)
地点(Place):腾讯会议ID: 895-283-145
时间(Time):2023年7月14日(周五), 9:00-10:00
邀请人(Inviter):张晓峰
报告摘要
This talk is concerned with a radially symmetric Keller-Segel systems with supercritical sensitivity subjected to homogeneous Neumann boundary conditions. We prove that there exists a critical mass m*, for arbitrary decreasing nonnegative initial data with mass large than m*, the corresponding solution blows up in finite time; for some decreasing nonnegative initial data with mass less than m*, the corresponding solutions are globally bounded. Our results extend that of Winkler's paper [Winkler, Math. Ann., 373 (2019), 1237-1282], where he proved similar results for the system with linear sensitivity.
主讲人简介
李玉祥,东南大学数学学院教授,博士生导师。2002年毕业于南京大学数学系,2008年在法国巴黎大三大数学系做访问学者。2017年评为江苏省优秀博士学位论文指导教师,2020年获教育部自然科学二等奖。研究领域涵盖非线性抛物型方程、KPZ方程、趋化方程等。在解的有限时刻爆破、整体存在性和渐近性等方面,获得了一些有意义的结果。在Comm. Math. Phys.、Math. Ann.、Nonlinearity、J. Differential Equations、European J. Appl. Math.、Ann. Henri Poincaré等刊物发表论文60余篇。作为项目主持人,已经完成多项国家自然科学基金。