Covariance and contravariance of vectors
- 共变和反变（在数学里，反变和共变描述一个向量的坐标，在向量空间的基底／坐标系转换之下，会如何改变）
Covariance and contravariance of vectors
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abstract:
In multilinear algebra and tensor analysis, covariance and contravariance describe how the quantitative description of certain geometric or physical entities changes with a change of basis. For holonomic bases, this is determined by a change from one coordinate system to another.
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