English

Positive curvature operator, projective manifold and rational connectedness

Differential Geometry 2019-06-18 v2

Abstract

In his recent work \cite{Y1}, X. Yang proved a conjecture raised by Yau in 1982 (\cite{Yau82}), which states that any compact K\"{a}hler manifold with positive holomorphic sectional curvature must be projective. In this note, we prove that any compact Hermitian manifold XX with positive real bisectional curvature, its hodge number h1,0=h2,0=hn1,0=hn,0=0h^{1,0}=h^{2,0}=h^{n-1,0}=h^{n,0}=0. In particular, if in addition XX is K\"{a}hler, then XX is projective. Also, it is rationally connected manifold when n=3n=3. This partially confirms the conjecture 1.11 \cite{Y1} which is proposed by X. Yang.

Keywords

Cite

@article{arxiv.1905.04894,
  title  = {Positive curvature operator, projective manifold and rational connectedness},
  author = {Kai Tang},
  journal= {arXiv preprint arXiv:1905.04894},
  year   = {2019}
}

Comments

9 pages. arXiv admin note: text overlap with arXiv:1708.06713, arXiv:1610.07165, arXiv:1802.08732 by other authors

R2 v1 2026-06-23T09:04:25.122Z