= Cosmological-constant domination
{title2=$H^2\simeq\Lambda c^2/3$}
An expanding-universe regime in which a positive <cosmological constant> supplies most of the <Friedmann equation>. The approximately constant positive expansion rate gives exponential growth of the <scale factor>. Since matter, <radiation>, and curvature contributions decay with expansion, a positive <cosmological constant> eventually dominates a perpetually expanding model containing them; this does not guarantee that curvature dominates at an intermediate time.
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