Hi. I am self-studying GR and have many questions. Here are a few. If anyone can help me with any of them I would be grateful. 1 - What is the difference between Tu v and Tvu ? 2 - I have read that the order of indices matters in tensors but when transforming tensors from one coordinate system to another it involves products of partial derivatives but the order of these doesn't matter so why does the position of indices matter ? 3 - When looking at the derivation of the Newtonian limit using gab = nab+hab could anyone explain how to get from Γa 00 = -1/2 gad ∂g00/ ∂xd to the following equation Γa 00 = -1/2 nad ∂h00 / ∂xd I don't understand what has happened to the had term 4 - I have been looking at the model solution to a question involving the Schwarzchild solution and timelike geodesics for radial motion only which states that the coordinate r does not correspond to physical distance from the gravitational source. What does it correspond to then ? 5 - In SR almost everything seems to boil down to comparisons between 2 inertial frames ie. the unprimed and primed frames. In the GR I have done so far I see no mention of any other frames. There are no primed frames anywhere. Is basic GR only concerned with one frame ?