Where should I ask about mathematical problems with Riemann curvature tensor

aditya ver.2.0
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I have come about few mathematical problems related to Riemann Tensor analysis while learning General Relativity. Should I ask these questions in this section or in the homework section. They are pretty hard!
 
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If they're actual homework for a class you're taking, you should ask them in the appropriate homework forum.

If you're trying to learn GR on your own, not as part of a class, and you have questions about things you're not sure of you can ask them here, but the homework forum template is still a good guide to follow if you want helpful answers: for example, if you're not sure why a certain property holds, don't just ask why it's true, show your own efforts to either prove or disprove it, and where you got stuck.
 
If the problems are for a graduate level class, I believe you are allowed to ask them here even if they are homework. If it's an undergraduate class, use the homework forums.

The guidelines have changed slightly, but it looks like this is still the case:

https://www.physicsforums.com/threads/new-pf-global-guidelines.148164/
Homework Help:
On posting questions: Any and all high school and undergraduate homework assignments or textbook style exercises for which you are seeking assistance are to be posted in our Science Education Zone. This should be done whether or not the problem is part of one's coursework. The reason for this is that the scientific and mathematical sections of Physics Forums are to be reserved for discussions and not academic assistance. Since graduate level assignments are meant to be more thought provoking (and hence more worthy of discussion), graduate level questions will be allowed in the relevant part of the main section of PF, provided that the graduate student attempts the problem and shows his work. NOTE: You MUST show that you have attempted to answer your question in order to receive help. You MUST make use of the homework template, which automatically appears when a new topic is created in the homework help forums.
 
Hi Pevect,

FYI The link didn't work for me... I attached a screen shot with the permissions error.
pervect said:
The guidelines have changed slightly, but it looks like this is still the case:

https://www.physicsforums.com/threads/new-pf-global-guidelines.148164/

upload_2014-11-17_11-32-43.png
 
That works, Thanks!
 
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From $$0 = \delta(g^{\alpha\mu}g_{\mu\nu}) = g^{\alpha\mu} \delta g_{\mu\nu} + g_{\mu\nu} \delta g^{\alpha\mu}$$ we have $$g^{\alpha\mu} \delta g_{\mu\nu} = -g_{\mu\nu} \delta g^{\alpha\mu} \,\, . $$ Multiply both sides by ##g_{\alpha\beta}## to get $$\delta g_{\beta\nu} = -g_{\alpha\beta} g_{\mu\nu} \delta g^{\alpha\mu} \qquad(*)$$ (This is Dirac's eq. (26.9) in "GTR".) On the other hand, the variation ##\delta g^{\alpha\mu} = \bar{g}^{\alpha\mu} - g^{\alpha\mu}## should be a tensor...

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