再论循环空间中全脐子流形

Reserarch Totally Umbilical Sub-manifolds in Recurrent Spaces

本文在作者前文工作的基础上继续考查 C循环空间子流形的全脐子流形特征 .给出了一个充分必要条件即定理 1 .从而结合已有文献我们推广并改进了 Olszak文中的相应结果 .

In this paper we research the totally umbilical sub-manifolds in recurrent space, we obtain a necessary and sufficient condition, i.e., Theorem 1. Coinciding with the proceeding works, one acknowledges the results in .