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How a quantity behaves under a change of basis vectors. This tag covers relativistic covariance, as well as contravariant and covariant tensors not necessarily in the context of relativity. DO NOT USE THIS TAG for statistical covariance.

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Definitions and usage of Covariant, Form-invariant & Invariant?

I'm from the old school of physics (1970). This is what I remember: ALL laws of nature must be so constituted that it is transformed into a law of exactly the same form when, instead of the space-ti …
William Young's user avatar