The Gysin exact sequence for $S^1$-equivariant symplectic homology

Details The Gysin exact sequence for $S^1$-equivariant symplectic homology The Gysin exact sequence for $S^1$-equivariant symplectic homology

2009-09-24

arxiv.org/abs/0909.4526v1

Mathematics

Symplectic Geometry

67 pages

Scientific paper

We define $S^1$-equivariant symplectic homology for symplectically aspherical manifolds with contact boundary, using a Floer-type construction first proposed by Viterbo. We show that it is related to the usual symplectic homology by a Gysin exact sequence. As an important ingredient of the proof, we define a parametrized version of symplectic homology, corresponding to families of Hamiltonian functions indexed by a finite dimensional smooth parameter space. We define a parametrized version of the Robbin-Salamon index, which gives the grading for these new versions of symplectic homology. We indicate several applications and ramifications of our constructions.

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