Obstruction for a virtual C^2 action on the circle
Event details
| Date | 27.04.2017 |
| Hour | 13:00 › 14:00 |
| Speaker | Sang-Hyun Kim Seoul National University |
| Location |
MA 12
|
| Category | Conferences - Seminars |
When does a group virtually admit a faithful C^2 action on the circle? We provide an obstruction using a RAAG. Examples include all (non-virtually-free) mapping class groups, Out(Fn) and Torelli groups. This answers a question by Farb. (Joint work with Hyungryul Baik and Thomas Koberda)
Practical information
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