English

Existence of a positive hyperbolic Reeb orbit in three spheres with finite free group actions

Symplectic Geometry 2023-10-05 v2

Abstract

Let (Y,λ)(Y,\lambda) be a non-degenerate contact three manifold. D. Cristfaro-Gardiner, M. Hutshings and D. Pomerleano showed that if c1(ξ=Kerλ)c_{1}(\xi=\mathrm{Ker}\lambda) is torsion, then the Reeb vector field of (Y,λ)(Y,\lambda) has infinity many Reeb orbits otherwise (Y,λ)(Y,\lambda) is a lens space or three sphere with exaxtly two simple elliptic orbits. In the same paper, they also showed that if b1(Y)>0b_{1}(Y)>0, (Y,λ)(Y,\lambda) has a simple positive hyperbolic orbit directly from the isomorhphism between Seiberg-Witten Floer homology and Embedded contact homology. In addition to this, they asked whether (Y,λ)(Y,\lambda) with infinity many simple orbits also has a positive hyperbolic orbit under b1(Y)=0b_{1}(Y)=0. In the present paper, we answer this question under YS3Y \simeq S^{3} with nontrivial finite free group actions, especially lens spaces (L(p,q),λ)(L(p,q),\lambda) with odd pp as quotient spaces of S3S^{3}.

Keywords

Cite

@article{arxiv.2204.01727,
  title  = {Existence of a positive hyperbolic Reeb orbit in three spheres with finite free group actions},
  author = {Taisuke Shibata},
  journal= {arXiv preprint arXiv:2204.01727},
  year   = {2023}
}

Comments

11 pages. The typo is fixed