Geometry and Topology Seminar——Extending surface automorphisms of surfaces over the 4-sphere
报告人：Shicheng Wang (Peking University)
时间：2023-04-12 13:00-15:00
地点：Room 1114, Sciences Building No. 1
Abstract: The topic indicated by the title sounds interesting, but is quite quiet (only three papers in nearly 40 years). We will discuss some recent observations and related facts.
