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澳大利亚新英格兰大学杜一宏教授学术报告预告
作者:李宏伟编辑:管煜点击量:

报告题目:Effects of some new free boundary conditions on the nonlocal KPP equation with free boundary

报 告 人:杜一宏,澳大利亚新英格兰大学 教授

报告摘要:I will report some recent results on the nonlocal reaction diffusion equation u_t-dL[u]=f(u) with a KPP type reaction term f(u) over a changing interval [g(t), h(t)], viewed as a model for the spreading of a species with population range [g(t), h(t)] and density $u(t,x)$. The nonlocal diffusion operator L[u] has the form L[u](t,x)=\int_{g(t)}^{h(t)}J(x-y)u(t, y)dy-u(t,x) while the free boundaries are governed by h’(t)=\mu\int_{g(t)}^{h(t)}K(h(t)-x)u(t,x)dx,  g’(t)=-\mu\int_{g(t)}^{h(t)}K(x-g(t))u(t,x)dx,as well as u(t, g(t))=u(t, h(t))=0, where K(z) is nonnegative and continuous for z\geq 0 with K(0)>0.Depending on the relationships between K and J, new behavior may appear. The basic model of Cao-Du-Li-Li (JFA2019) corresponds to the case that K(z)=\int_z^\infty J(x)dx. Some new relations between J and K will be examined. The talk is based on joint works with Xin Long, Wenjie Ni, Fernando Quiros and Tianshan Yi.

报告人简介:杜一宏教授,澳大利亚科学院院士,1988年获得博士学位,并留山东大学工作;1990年赴英国Heriot-Watt大学访问,1991年至今在澳大利亚新英格兰大学工作,现为该校数学系教授。杜一宏教授是非线性泛函分析、偏微分方程及其应用等领域的国际知名专家,是使用非线性自由边界问题对扩散现象进行建模的先驱和领导者,解决了长期存在的尖锐阈值,边界爆破,分岔和多解个数问题。多次赴中国、美国、英国、德国、法国、西班牙,日本,加拿大等国家和地区的高校或科研机构访问。在Arch. Rational Mech. Anal.,  Math. Ann., SIAM J. Math. Anal.,  J. Funct. Anal.,  J. European Math. Soc., Trans. Amer. Math. Soc., JDE, CVPDE, J. Math. Pures Appl. 等国际知名期刊上发表论文150余篇(被引4000余次),并出版专著2部。自2003年持续获得澳大利亚国家自然科学基金的资助。目前,担任多个国际期刊杂志的编委。

报告时间:2024年10月9日(星期三)下午16:00-17:30

报告地点:文渊楼B119

主办单位:数学与统计学院