Hofer Geometry for Lagrangian Loops

We examine three invariants for exact loops of Lagrangiansubmanifolds that are modelled on invariants introduced by LeonidPolterovich for loops of Hamiltonian symplectomorphisms. One ofthese is the minimal Hofer length in a given Hamiltonian isotopyclass. We determine the exact values of these invariants for loopsof projective Lagrangian planes. The proof uses the Gromovinvariants of an associated symplectic fibration over the 2-discwith a Lagrangian subbundle over the boundary. The last twochapters concern different topics and can be read completelyindependently.

Autorentext
Dr. Meike Akveld wissenschaftliche Mitarbeiterin am Departement für Mathematik, ETH Zürich.

Klappentext
We examine three invariants for exact loops of Lagrangian submanifolds that are modelled on invariants introduced by Leonid Polterovich for loops of Hamiltonian symplectomorphisms. One of these is the minimal Hofer length in a given Hamiltonian isotopy class. We determine the exact values of these invariants for loops of projective Lagrangian planes. The proof uses the Gromov invariants of an associated symplectic fibration over the 2-disc with a Lagrangian subbundle over the boundary. The last two chapters concern different topics and can be read completely independently.