English

Real hypersurfaces in $Q^m$ with commuting structure Jacobi operator

Differential Geometry 2019-01-24 v2

Abstract

In this paper we study real hypersurfaces in the complex quadric space QmQ^m whose structure Jacobi operator commutes with their structure tensor field. We show that the Reeb curvature α\alpha of such hypersurfaces is constant and if α\alpha is non-zero then the hypersurface is a tube around a totally geodesic submanifold CPkQm\mathbb{C} P^k \subset Q^m, where m=2km=2k. We also consider Reeb flat hypersurfaces, namely, when the Reeb curvature is zero. We show that the tube around CPkQm\mathbb{C} P^k \subset Q^m (m=2km=2k), with radius π4\frac{\pi}{4} is the only Reeb flat Hopf hypersurface with commuting Ricci tensor and also the only one with commuting shape operator. Finally, we prove that there does not exist any Reeb flat Hopf hypersurfaces with non-parallel Killing Ricci tensor or with Killing shape operator.

Keywords

Cite

@article{arxiv.1807.11021,
  title  = {Real hypersurfaces in $Q^m$ with commuting structure Jacobi operator},
  author = {N. Heidari and S. M. B. Kashani and M. J. Vanaei},
  journal= {arXiv preprint arXiv:1807.11021},
  year   = {2019}
}
R2 v1 2026-06-23T03:18:08.187Z