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张量篇-初步
2022-07-30 10:06:00 【GZVIMMY】
1.爱因斯坦求和约定

同一符合出现两次则求和,指标范围由上下文确定
2.克罗内克符号

3.一阶张量-从旋转坐标轴开始


给出基本定义:

这个vi可以构成一个向量或一阶笛卡尔张量v的分量。一阶张量v在坐标轴的旋转下不发生变化;然而,由于基集确实改变了.
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