English

Contact structures, CR Yamabe invariant, and connected sum

Differential Geometry 2019-11-11 v2

Abstract

We propose a global invariant σc\sigma_c for contact manifolds which admit a strictly pseudoconvex CR structure, analogous to the Yamabe invariant σ\sigma. We prove that this invariant is non-decreasing under handle attaching and under connected sum. We then give a lower bound on σc\sigma_c in a particular case.

Keywords

Cite

@article{arxiv.1812.01506,
  title  = {Contact structures, CR Yamabe invariant, and connected sum},
  author = {Gautier Dietrich},
  journal= {arXiv preprint arXiv:1812.01506},
  year   = {2019}
}
R2 v1 2026-06-23T06:31:25.385Z