|COOKIES: By using this website you agree that we can place Google Analytics Cookies on your device for performance monitoring.|
Dehn twists and free subgroups of the symplectic mapping class group
If you have a question about this talk, please contact Ivan Smith.
Given two Lagrangian spheres in an exact symplectic manifold, we present conditions under which the Dehn twists about them generate a free non-abelian subgroup of the symplectic mapping class group. This extends a result of Ishida for Riemann surfaces. The proof generalises the categorical version of Seidel’s long exact sequence to arbitrary powers of a fixed Dehn twist. Time allowing, we construct families of examples containing such spheres.
This talk is part of the Differential Geometry and Topology Seminar series.
This talk is included in these lists:
Note that ex-directory lists are not shown.
Other listsCambridge University European Society Other medicinal chemistry symposia Mathematical Physics Seminar
Other talksTBC How to assess violence risk in psychiatry: new research & clinical implications Indo-European and Iranian layers of Armenian vocabulary: the case of month names Anglo-Saxon Sources of the Theological Windows at Canterbury Cathedral Diapycnal mixing in stratified plane Couette flows Inner and outer wellbeing: A double perspective on the processing of thoughts and environment