• Liu Ximin

Articles written in Proceedings – Mathematical Sciences

• On Ricci curvature ofC-totally real submanifolds in Sasakian space forms

LetMn be a Riemanniann-manifold. Denote byS(p) and Ric(p) the Ricci tensor and the maximum Ricci curvature onMn, respectively. In this paper we prove that everyC-totally real submanifold of a Sasakian space formM2m+1(c) satisfies$$S \leqslant (\frac{{(n - 1)(c + 3)}}{4}) + \frac{{n^2 }}{4}H^2 )g$$, whereH2 andg are the square mean curvature function and metric tensor onMn, respectively. The equality holds identically if and only if eitherMn is totally geodesic submanifold or n = 2 andMn is totally umbilical submanifold. Also we show that if aC-totally real submanifoldMn ofM2n+1 (c) satisfies$$\overline {Ric} = \frac{{(n - 1)(c + 3)}}{4} + \frac{{n^2 }}{4}H^2$$ identically, then it is minimal.

• # Proceedings – Mathematical Sciences

Current Issue
Volume 129 | Issue 3
June 2019