演讲人: 陈丽教授， 德国Mannheim大学

讲座时间: 9月5日下午，4:00-5:00

讲座地点: 人民大学环境学院318房间

讲座内容:

Abstract: 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.