常曲率空间的子流形外蕴几何量界的估计

The research of section curvature with constant curvature space submanifold

利用选取合适的坐标架,通过对子流形M的三个基本方程的推导,得到了三个相关的定理,并且将结果推广到Ricci曲率和数量曲率。

In this paper,we choose a suitable coordinate and deduce the fundamental ecpiations of the submanifold M.Then we get two related results,and extend the results to the conclusion of the Ricci curvature and numeral curvature.