About a big mapping class group.
Event details
| Date | 02.12.2015 |
| Hour | 16:30 › 17:30 |
| Speaker | Juliette Bavard (Paris) |
| Location |
CM010
|
| Category | Conferences - Seminars |
The mapping class group of the complement of a Cantor set in the plane arises naturally in dynamics. To get informations about this "big mapping class group", we can look at its action on a Gromov hyperbolic space: the ray graph. In this talk, I will explain why this ray graph has infinite diameter and is Gromov-hyperbolic. I will then exhibit an element of the big MCG which has a loxodromic action on the ray graph, and explain why this element is useful to construct non trivial quasimorphisms on the group.
Practical information
- Informed public
- Free
Organizer
- Louis Merlin