English

Note on coisotropic Floer homology and leafwise fixed points

Symplectic Geometry 2020-12-01 v3

Abstract

For an adiscal or monotone regular coisotropic submanifold NN of a symplectic manifold I define its Floer homology to be the Floer homology of a certain Lagrangian embedding of NN. Given a Hamiltonian isotopy ϕ=(ϕt)\phi=(\phi^t) and a suitable almost complex structure, the corresponding Floer chain complex is generated by the (N,ϕ)(N,\phi)-contractible leafwise fixed points. I also outline the construction of a local Floer homology for an arbitrary closed coisotropic submanifold. Results by Floer and Albers about Lagrangian Floer homology imply lower bounds on the number of leafwise fixed points. This reproduces earlier results of mine. The first construction also gives rise to a Floer homology for a Boothby-Wang fibration, by applying it to the circle bundle inside the associated complex line bundle. This can be used to show that translated points exist.

Keywords

Cite

@article{arxiv.1707.04478,
  title  = {Note on coisotropic Floer homology and leafwise fixed points},
  author = {Fabian Ziltener},
  journal= {arXiv preprint arXiv:1707.04478},
  year   = {2020}
}

Comments

11 pages. I have split this article off from "Leafwise fixed points for $C^0$-small Hamiltonian flows" arXiv:1408.4578 . version 2: I included a definition of Floer homology for an adiscal or monotone regular coisotropic submanifold

R2 v1 2026-06-22T20:47:11.459Z