应苏颖副教授邀请，法国数学家Henry Berestycki院士将访问数学系做学术报告,欢迎感兴趣的师生参见！

报告时间：9月29日 10:00-11:00
报告地点：数学系报告厅，格物楼503
报告题目：Propagation in non homogeneous media and applications

报告摘要：I will start by introducing reaction-diffusion equations, describing the motivation and reviewing the classical theory for homogeneous Fisher and  Kolmogorov-Petrovsky-Piskunov (KPP) equations. A fundamental result is the determination of an invasion speed that governs the asymptotic speed of propagation. This equation plays an important role in a variety of contexts in ecology, biology and physics.
A central question in this theory at present is to understand heterogeneous and also non-local versions of such equations. There are many motivations for such extensions that I will describe. I will present several recent results in these directions.

报告人简介：Henri Berestycki，著名偏微分方程专家，美国艺术与科学学院外籍院士，于1975年在巴黎六大获得博士学位，师从泛函分析专家Haim Brezis，先后在芝加哥大学，巴黎六大，十三大，巴黎高等师范任教，2001起，在法国社会科学高等研究院工作。Berestycki教授曾担任巴黎六大数学系系主任，法国社会科学高等研究院经理及该院数学中心主任，现为欧盟ERC高级项目“ReaDi”的负责人；曾（现）任包括Journal of the European Mathematical Society, Journal of Differential Equations等多个期刊的编委；曾获得法国骑士勋章，法国科学院的Sophie Germain奖和Carriere奖，德国洪堡基金的Humboldt-Gay-Lussac奖；在Journal of the American Mathematical Society, Journal of the European Mathematical Society, Communications on Pure and Applied Mathematics等期刊发表论文130多篇，被引用4500多次（MathSciNet）