An Analytic Expression for the Growth Function in a Flat Universe with a Cosmological Constant

Abstract

An analytic expression is given for the growth function for linear perturbations in a low-density universe made flat by a cosmological constant. The result involves elliptic integrals but is otherwise short and straight-forward.

5 pages, LaTeX, 1 ps fig included. Submitted to ApJ. No text changes; LaTeX altered to be backwards compatible with v2.09

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