flat space

Specific Riemann manifolds-pseudo Ricci symmetric manifolds are studied by using Riemann curvature and Weyl conformal curvature, and necessary and sufficient conditions of manifolds and submannifolds become Ricci-flat space are given.

同时得到了流形与子流形成为Ricci平坦空间的充要条件。

In this paper,we study the geometric quantities and properties of projectively flat Finsler spaces.

本文研究了射影平坦Finsler空间的几何量及其几何性质。

Generalized Elastic Curves in Lorentz Flat Space L~4

洛伦兹平坦空间L~4中的一般弹性曲线

geometry of flat Banach space

平坦巴拿赫空间几何学

On the Condition for a Conformal Flat Finsler Space being Minkowski Space;

共形平坦Finsler空间是Minkowski空间的条件

A Class of Special Projectively Flat(α, β)-Metric and the Dual Flat Finsler Space;

一类特殊的射影平坦的（α，β）空间以及对偶平坦的Finsler空间

On Conformal Transformations in Projectively flat Finsler space;

射影平坦Finsler空间的共形映射

Some Hypersurfaces in a Conformally Flat Lorentzian Manifold with Constant Mean Curvature

共形平坦Lorentz空间具常平均曲率的一类超曲面

THE SOLUTION OF THE EINSTEIN FIELD EQUATIONS ON CONFORMALLY FLAT SPACETIMES WITH PERFECT FLUID SOURCE

关于共形平坦时空间的理想流体源的爱因斯坦方程的解

Submanifolds with Flat Normal Bundle and Constant Scalar Curvature in Space Form S~(n+p) (c);

空间形式S~(n+p)(c)中法丛平坦的常数量曲率子流形

In this paper, we study2- harmonic spacelike hypersurfaces in a locally symmetric and conformally flat lorentz manifold and obtain a pinching theorem of the class of hypersurfaces to the ambient manifold.

研究局部对称共形平坦洛伦兹流形中的2-调和类空超曲面,得到它对外围空间的一个拼挤定理.

The theory of relativity is Einstein's theory concerning space, time, and motion.

相对论是爱因斯坦关于空间、时间和运动的理论。

Their car bowled along the smooth country road.

他们的汽车在平坦的乡间道路上平稳地疾驶。

When this tensor vanishes, the space is calleda flat.

当这一张量为零时，空间叫做平直空间。

"Substantial Space" and "Conceptual Space" as Regards Decrease in Fertility Rate

生育水平下降的“实在空间”与“观念空间”

The First Canonical Fundamental Form of an Einstein Space E_n which Admits r Independent Concircular Transformations

允许保圆变换的爱因斯坦空间的规范基本形式

Conference on the Peaceful Uses of Outer Space

和平利用外层空间会议

space-charge balanced flow

【电子】空间电荷平衡流

half plane in the pattern space

模式空间中的半平面

F(p,q,s) Spaces and Cesàro Means;

F(p,q,s)空间与Cesàro平均