Geometry and Topology Seminar——Three manifold groups and their profinite completions
                    
                  
                  
                  
                    报告人:Yi Liu (Peking University)
 
                    时间:2023-03-01  14:00-16:00
  
                    地点:Room 1114, Sciences Building No. 1
                   
                  
                    Abstract: The profinite completion of a group is the inverse limit of all the finite quotient of the group. To what extent it determines the isomorphism type of the group itself was a group theoretic question, but the past decade has witnessed progress of the topic restricted to the class of 3-manifold groups. In this talk, I will give a general survey of what has been known and what remains unknown about 3-manifold groups and their profinite completions.