|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 listsViolence and Conflict Graduate Workshop, Faculty of History SCAMPS 09 - One day Symposium CASP seminar series
Other talksTales from the Fen Edge: past environments. peat, marl and mud Redefining the Churg-Strauss syndrome through genetics Can we exploit companion dogs to advance therapies for spinal cord injury? TBC Dr Becca Asquith: KIRs, CD8 T cell dynamics and control of chronic viral infection Towards an evidence base for best practice in mathematics education