仿射几何学 仿射变换下重要的不变性质和不变量有:共线性、平行性、平行线段的长度比等。
回答: gr01 Weyl研究GR,n维黎曼流形等距嵌入到一个高维欧氏空间之中, 平行位移时矢量方向要发生变化,也就是说各个分量都在改变
由 marketreflections
于 2011-06-27 17:17:43
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