Symplectic topology of Mañé's critical values

Details Symplectic topology of Mañé's critical values Symplectic topology of Mañé's critical values

2009-03-04

arxiv.org/abs/0903.0700v4

Mathematics

Symplectic Geometry

101 pages, no figures, final version appeared in Geometry and Topology

Scientific paper

We study the dynamics and symplectic topology of energy hypersurfaces of mechanical Hamiltonians on twisted cotangent bundles. We pay particular attention to periodic orbits, displaceability, stability and the contact type property, and the changes that occur at the Mane critical value c. Our main tool is Rabinowitz Floer homology. We show that it is defined for hypersurfaces that are either stable tame or virtually contact, and it is invariant under under homotopies in these classes. If the configuration space admits a metric of negative curvature, then Rabinowitz Floer homology does not vanish for energy levels k>c and, as a consequence, these level sets are not displaceable. We provide a large class of examples in which Rabinowitz Floer homology is non-zero for energy levels k>c but vanishes for k

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