We get some results about the scalar curvature of 2 and n(n≥3)dimensions Einstein manifold :ρ Maybe is constant and ρ is constant, the relation between Einstein Manifold and Riemannian Manifold with constant sectional curvature.

本文對其有關(guān)性質(zhì)進(jìn)行了討論被干爽死黄色视频，得到了2維和n(n≥3)維愛因斯坦流形的數(shù)曲率的一些結(jié)果：ρ可能為常數(shù)和ρ為常數(shù)，以及愛因斯坦流形與常曲率黎曼流形之間的關(guān)系

In chapter 4,we consider the existence of harmonic function in negative sectional curvature manifolds.we get that,if Ricci ≥-C(1 + r~2)r =ρ(O.x, then there have non-canstant bounded harmnic function in negative sectional curvature manifolds.

第四章考慮負(fù)曲率流形上調(diào)和函數(shù)国产激情视频久久久，得到了在Ricci≥-C(1+r~2)其中r=ρ的負(fù)曲率流形的調(diào)和函數(shù)的存在性人人做人人爽人人澡狠狠添。

Theorem 4 There is no compact totally real 2-harmonic submanifold with non-zero parallel mean curvature and positive sectional curvature in a locally symmetric Bochner -Kaehler manifold.

定理4局部對稱Bochner-Kaehler流形中不存在具有非零平行平均曲率向量且截面曲率大于零的緊致全實2-調(diào)和子流形。

In Chapter2, we first study the existence of Chebyshev coordinates of time-like (or space-like) submanifolds with a constant sectional curvature in N〓. Afterwards, we generalize the classical Backlund theorem for space-like (or time-like) submanifolds in N〓 and N〓.

在第二章中激情影院福利，首先我們研究了偽黎曼空間形式N〓中常曲率類空子流形的Chebyshev坐標(biāo)的存在性www.rihanav；然后把經(jīng)典的Backlund定理推廣到高維的偽黎曼空間形式N〓和N〓中。

The Pinching problems are discussed on the sectional curvature of compact space-like pseudo-umbilical submanifolds M~n with parallel mean curvature vector in De Sitter space S~_p, and the theory of reduction of the codimension is obtained in De Sitter space through evaluating the Laplacian of square of the length.

討論了De Sitter空間Snp+p中欧美黄色片久久，具有平行平均曲率向量的緊致類空偽臍子流形Mn的截面曲率的拼擠問題中文字幕制服丝袜第57页，通過估計第二基本形式模長平方的Laplacian，得到了De Sitter空間中的余維數(shù)壓縮定理一级WWW。

sectional curvature：截面曲率

sectional area 截面積 | sectional curvature 截面曲率 | sector 扇形

holomorphic sectional curvature：全純截曲率

流線曲率法:Streamline curvature method | 全純截曲率:holomorphic sectional curvature. | 主曲率匹配:principal-curvature match