- Series
- Geometry Topology Seminar
- Time
- Monday, March 28, 2022 - 2:00pm for 1 hour (actually 50 minutes)
- Location
- Speaker
- Jonathan Bowden – jonathan.bowden@mathematik.uni-regensburg.de
- Organizer
- Roberta Shapiro
We discuss the problem of constructing quasi-morphisms on the group of diffeomorphisms of a surface that are isotopic to the identity, thereby resolving a problem of Burago-Ivanov-Polterovich from the mid 2000’s. This is achieved by considering a new kind of curve graph, in analogy to the classical curve graph first studied by Harvey in the 70’s, on which the full diffeomorphism group acts isometrically. Joint work with S. Hensel and R. Webb.