Anybody like to help a physics student who did their BSc six years ago and has forgotten all their maths!(adsbygoogle = window.adsbygoogle || []).push({});

Its a problem from Andrew Liddle's Introduction to cosmology 5.5

The Friedmann eqn is

(a'/a)2 = 8TTG/3 P - k/a2

Consider the case k>o, with the universe containing matter only, so that p =p0/a3

Demonstrate that the parametric solution

a(y) = 4 TT G p0/3k (1-cos y) ; t(y) = 4TTGp0/3k3/2 (y-siny)

solves this equation where y runs from 0 to 2TT

Sorry about the crassness..I hope you can deciphere my symbols...

I know I should differentiate them and use the chain rule..but really my maths is rubbish!!

Any fellow physicists I would much appreciate it...maybe I shouldn't be doing my masters..I need to dig out my old calculus book...

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# Help a mature student! Friedmann equation!

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