Non-negatively curved C-totally real submanifolds in a Sasakian manifold
The main result is the following: Let M be an n-dimensional compact curvature-invariant C-totally real submanifold in a \((2n+1)\)-dimensional Sasakian manifold with \(\eta\)-parallel mean curvature vector field. If the sectional curvature of M is positive, then M is totally geodesic.
scientific article; zbMATH DE number 4046593