讲座题目：Critical exponents for degenerate Keller-Segel system

主讲人：Prof.Dr.Li Chen（University of Mannheim, Germany）

主持人：陈秀卿副教授

时间：2014年9月6日（周六）上午10:00-11:00

地点：主楼1214

主要内容：

Keller-Segel (KS) systems are important models in the study of chemotaxis in mathematical biology. They describe the collective motion of cells or the evolution of the density of bacteria. Two totally different mechanisms (diffusion and nonlocal aggregation) are reflected in the KS-system. In 2-d, the system contains a critical mass above which the solution blows up in finite time. We will explain the generalization of the critical mass from 2-D to multi-dimension in nonlinear diffusion case. The talk is based on joint works with Jian-Guo Liu and Jinhuan Wang.

主讲人简介：

Li Chen is a chair professor of mathematics in University of Mannheim, Germany. Her current research interests are on "Applied analysis" , mainly focused on partial differential equations and their applications in other sciences such as physics, biology and economy. Please see her website for more information.