# Pleas Help me!

Hello my friends

I have a question about riemannian tensor. how Get Rii in space with d-dimentions? for example in coordinate taht linear element is
ds^2=(dx^2+dy^2+dz^2)/[1+/(K/4)*(x^2+y^2+z^2)] where K is Gaussian tensor.

Thanks! ## Answers and Replies

robphy
Science Advisor
Homework Helper
Gold Member
do you mean "curvature" for K?

In any case, as it stands, this isn't really a relativity question... it's more of a tensor or differential geometry question...but it really sounds like a mathematics homework problem. What is your starting point? Show some work first.

Chris Hillman
Science Advisor
Hi, Physicor,

I second what Rob said and add (if this is homework, I probably shouldn't) that you appear to have written down what might be the desired answer to a problem asking you to compute curvature of spatial hyperslices (orthogonal to the world lines of the matter) in an FRW model.

But general Relativity depends this case. because when you talk about relativity, it is important that understanding some problems and subjects such as riemannian geometry & etc, specially for describtion of this answer that riemann proved it. there is a space with above line - element that K is gaussian curvature tensor (http://mathworld.wolfram.com/GaussianCurvature.html)

I can not understand this question " do you mean "curvature" for K? "

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thank u Chris Hillman. but my question didn't depend your answer.

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Good luck!