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I am learning SR, and don't understand the difference between the following notations of a Lorentz transformation $\Lambda$ $$\Lambda_{\mu\nu} , \Lambda_{\mu}\ ^\nu , \Lambda^{\mu\nu}$$

I know that they are related to the size of the tensor, but I am not sure how they are different

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marked as duplicate by Qmechanic Aug 14 at 16:02

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