Hello there I may have physical mistakes and stupid question so say if I have something wrong. But I want to get help on Freidmann equation.It looks like this: So first I want to know what that What you can calculate with this equation. Second question is what's the little point on capital r. And what's the k ?(adsbygoogle = window.adsbygoogle || []).push({});

PS! Can I get some webpages where I can read about cosmology.

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# Freidmann equation

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