English

Removing parametrized rays symplectically

Symplectic Geometry 2020-09-14 v1 Differential Geometry

Abstract

Extracting isolated rays from a symplectic manifold result in a manifold symplectomorphic to the initial one. The same holds for higher dimensional parametrized rays under an additional condition. More precisely, let (M,ω)(M,\omega) be a symplectic manifold. Let [0,)×QR×Q[0,\infty)\times Q\subset\mathbb{R}\times Q be considered as parametrized rays [0,)[0,\infty) and let φ:[1,)×QM\varphi:[-1,\infty)\times Q\to M be an injective, proper, continuous map immersive on (1,)×Q(-1,\infty)\times Q. If for the standard vector field t\frac{\partial}{\partial t} on R\mathbb{R} and any further vector field ν\nu tangent to (1,)×Q(-1,\infty)\times Q the equation φω(t,ν)=0\varphi^*\omega(\frac{\partial}{\partial t},\nu)=0 holds then MM and Mφ([0,)×Q)M\setminus \varphi([0,\infty)\times Q) are symplectomorphic.

Keywords

Cite

@article{arxiv.2009.05465,
  title  = {Removing parametrized rays symplectically},
  author = {Bernd Stratmann},
  journal= {arXiv preprint arXiv:2009.05465},
  year   = {2020}
}

Comments

7 pages

R2 v1 2026-06-23T18:28:33.533Z