华罗庚班主题报告十三

报告题目：What Are Homotopy Groups

报告人：吴杰 教授 （新加坡国立大学数学系）

报告时间：2015年7月22日（周三）晚19点

报告地点：研教楼212

报告简介：In this introductory talk, we will explain what the homotopy groups are, the tools for computing homotopy groups, the non-triviality problem of homotopy groups of spheres, the exponent problem of homotopy groups, and the connections of homotopy groups with braid groups, link groups and combinatorial group theory.

报告人简介：Professor Jie Wu was born in Zhejiang, China. He obtained his master's degree in mathematics from Nankai University in 1989 and his PhD degree from the University of Rochester in 1995. After taking his postdoctoral/lectural positions in University of California in Berkeley, University of Toronto and University of Pennsylvania, he joined with National University of Singapore in 1999 with promotion to full professor in 2009. His main research interests are algebraic topology with connections to braids, links, mapping class groups and representation theory. His joint work with Professor Paul Selick on homotopy theory established a fundamental connection between unstable homotopy theory and the modular representation theory. His work on simplicial groups gave a combinatorial des_cription of homotopy groups of spheres. Due to a surprising discovery on a fundamental connection between the theory of braids and homotopy groups, he and Professor Jon Berrick shared the National Science Award of Singapore in 2007. He published over 30 research papers in Journal of American Mathematical Society and other reputable journals.

数学科学学院

2015年7月20日