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Ends and splittings of groups
Student-Run Geometry/Topology Seminar| Speaker: | Peter Scott, University of Michigan |
| Related Webpage: | http://www.math.lsa.umich.edu/~pscott/ |
| Location: | 3106 MSB |
| Start time: | Tue, Apr 30 2019, 11:00AM |
I will assume only that the audience knows basic facts about the fundamental group. I will discuss van Kampen's Theorem, free groups, amalgamated free products and HNN extensions. I will also link these ideas with groups acting on trees. Then I will discuss ends of spaces and of groups, ending with Stallings' famous theorem describing groups with more than one end.