I was searching a cosmology calculator and In one calculator I saw this equation.(adsbygoogle = window.adsbygoogle || []).push({});

##1=Ω_k+Ω_m+Ω_Λ##

is that true true for all type universe's (open,flat,closed) ?

and is here ##Ω_k={-k\over H^2_0 /a^2_0}## isnt it.

(And If you can give me an article about this issue I will be very happy,I need exact proof)

Thanks

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# Universe density types equation

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