On a type of P-Sasakian manifold
The authors show: If a P-Sasakian manifold is Ricci-semi-symmetric, then it is Einstein; if it is semi-symmetric, then it has constant curvature. They also consider P-Sasakian manifolds which are hypersurfaces of a Riemannian manifold of constant curvature~\(1\).
scientific article; zbMATH DE number 1652691