题目：On Orbit Braids
报告人：吕志 教授（复旦大学 数学科学澳门新葡萄京888）
摘要：Let $M$ be a connected topological manifold of dimension at least 2 with an effective action of a finite group $G$. Associated with the orbit configuration space of the $G$-manifold $M$, we give the notion of orbit braids and define the orbit braid group. We further study the subgroups of orbit braid group and various relations among these subgroups with the fundamental groups of the configuration spaces given by the manifold $M$ with or without the $G$-action, and the $M/G$. We also calculate the orbit braid groups in the plane with two typical actions. This talk is based upon the joint work with Hao Li and Fengling Li.
Copyright © 2018 澳门新葡萄京888官网-注册娱乐所有网站 版权所有.