3维拟-Sasaki流形上的Ricci曲率

Ricci Curvature of 3-dimcnsionaI Quasi-Sasakian Manifolds

本文给出了沿ζ方向Ricci曲率非零的3维紧致拟-Sasaki流形是常曲率流形的一个条件。

In the present paper, we give one condition for a 3-dimensional compact quasi-Sasakian manifold with nonzero Ricei curvature along ζ to be a constant curvature manifold