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Results tagged with notation
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user 190421
This tag is for questions on the meaning, history, and usage of various symbols and notation that are used to denote different quantities in physics. Don't forget to mention the reference, where you encountered those notations.
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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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