- Prove the following special case of van Kampen’s theorem: if \[ X=U\cup V, \] where \(U,V\) are open and simply connected and \(U\cap V\) is nonempty and path-connected, then \(X\) is simply connected.
- State precisely the full Seifert–van Kampen theorem.
The simply connected case of van Kampen and the full theorem
P-WESTOP11-6
- Area
- Topology
- Seen at
- WESLEYAN
- Years
- 2011
- Status
- draft