Index notation in GR is really confusing ! I'm confused about many things but one thing is the order of index placement , ie. is Λ(adsbygoogle = window.adsbygoogle || []).push({}); ^{a}_{ b}the same as Λ_{b}^{a}? And if not what is the difference ? Thanks

If anyone knows of any books or lecture notes that explain index gymnastics step by step that would be great.

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# Index placement

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