Geometry Seminar

 

 

 

S¹ actions on 5-manifolds

 

 

Professor Haibao Duan

Institute of Mathematics, CAS

 

 

 

Abstract

We recall the classifications of 4 and 5 dimensional manifolds due to Whitehead, Freedmann, Smale and Barden. Based on these works we show that all 1-connected 4-manifolds can be achieved as quotients of regular circle actions on connected sums of S2  ´ S3.

 

Date:

May 10, 2007 (Thursday)

Time:

4:00 – 5:00pm

Place:

Room 517, Meng Wah Complex, HKU

 

 

 

 

All are welcome