English

Any Sasakian structure is approximated by embeddings into spheres

Differential Geometry 2024-08-27 v2

Abstract

We show that, for any given q0q\geq 0, any Sasakian structure on a closed manifold MM is approximated in the CqC^{q}-norm by structures induced by CR embeddings into weighted Sasakian spheres. In order to obtain this result, we also strengthen the approximation of an orbifold K\"ahler form by projectively induced ones given by Ross and Thomas in [21] in the C0C^0-norm to a CqC^{q}-approximation.

Keywords

Cite

@article{arxiv.2210.00790,
  title  = {Any Sasakian structure is approximated by embeddings into spheres},
  author = {Andrea Loi and Giovanni Placini},
  journal= {arXiv preprint arXiv:2210.00790},
  year   = {2024}
}

Comments

To appear in Forum Mathematicum, Main results changed thanks to an observation of the reviewer

R2 v1 2026-06-28T02:35:23.588Z