[Topology.beta] Reminder about today's talk

[Benedetti, G. (Gabriele)]

Dear all,



Just a quick reminder that Johanna Bimmermann (University of Heidelberg<https://www.mathi.uni-heidelberg.de/~jbimmermann/>) will talk today at 3pm in the Mathlab (09A46). Below you find the title and abstract.



All the best,



Gabriele



Title: On the Hofer-Zehnder capacity of magnetic surfaces via pseudo-holomorphic curves



Abstract:  The Hofer-Zehnder capacity is a symplectic invariant that roughly speaking measures the symplectic size of a manifold in terms of the possible Hamiltonian dynamics. In general this quantity is hard to compute and only known in few cases. In this talk I will present a computation of its value for the tangent bundle over surfaces with a certain twisted symplectic form. The main tools will come from theory of pseudo holomorphic curves and the existence of a Hamiltonian circle action.

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