- Series
- Geometry Topology Seminar
- Time
- Friday, November 8, 2013 - 2:05pm for 1 hour (actually 50 minutes)
- Location
- Skiles 006
- Speaker
- G. Masbaum – Institut de Mathématiques de Jussieu
- Organizer
- Thang Le
Let g be a positive integer and let Gamma_g be the mapping
class group of the genus g closed orientable surface. We show that
every finite group is involved in Gamma_g. (Here a group G is said to
be involved in a group Gamma if G is isomorphic to a quotient of a
subgroup of Gamma of finite index.) This answers a question asked by
U. Hamenstadt. The proof uses quantum representations of mapping class
groups. (Joint work with A. Reid.)