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Results tagged with metric-tensor
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user 190421
The variables used in general relativity to describe the shape of spacetime. If your question is about metric units, use the tag "units", and/or "si-units" if it is about the SI system specifically.
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Difference between contravariant and covariant vector multiplication
I am having trouble in distinguishing the difference between two types of multiplication. Basically if we have $X^{\mu}=(ct,\textbf{x})^{\mu}$, what is the difference between
$$\textbf{j}_{\mu}~X^{\m …
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