General Relativity: An Introduction for Physicists · Problem 15.9

Cosmological models — Hobson, Efstathiou & Lasenby

Physics · density-parameter-sum-rule

Problem

Show that at all cosmic times the density parameters obey the relation Ωm+Ωr+ΩΛ+Ωk=1.\Omega_m + \Omega_r + \Omega_\Lambda + \Omega_k = 1.

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