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= Friedmann equation
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$H=\dot a/a$, a fluid with $P=w\rho$ has $\rho\propto a^{-3(1+w)}$, and $\rho_{\rm crit}=3c^2H^2/(8\pi G)$.


Friedmann equations

Past exam of the mathematics course of the University of Cambridge / 2001 / iii / Paper 70 / 4 / a / Solution

Past exam of the mathematics course of the University of Cambridge / 2001 / iii / Paper 70 / 4 / c / ii / Solution

Past exam of the mathematics course of the University of Cambridge / 2002 / iii / Paper 45 / 1 / d / Solution

Past exam of the mathematics course of the University of Cambridge / 2002 / iii / Paper 71 / 1 / b / Solution

Friedmann equations

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Friedmann equations

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