How to calculate spatial correlation function

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Nicole Konforti 2017-1-30

编辑： per isakson 2017-12-1

How do I calculate the (spatial) correlation function?

Xi(r) = (1/2(pi^2))[integral:dk k^2 P(k) (sin(kr)/kr)

What is P(k)? How do I calculate it? What is a variable and what is a constant in this equation?

thank you

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