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AN ALMOST PARACONTACT STRUCTURE AND FAMILY OF TOTALLY UMBILICAL HYPERSURFACES
【摘要】 <正> In a P-Sasakian manifold, the following relation is known:Recently, T. Adati, I. Sat? et al. showed the following theorems: Theorem A. A Ricci-recurrent, Riemannian-recurrent or essentially conformally symmetric P-Sasakian manifold does not exist. Theorem B. If a P-Sasakian manifold is locally symmetric, then it is a manifold with a
【关键词】 manifold；
Riemannian；
Ricci；
symmetric；
essentially；
locally；
curvature；
latter；
耐公；
介公；
- 【文献出处】 Science Bulletin ,科学通报(英文版) , 编辑部邮箱 ,1985年04期
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