Equation Icon  (| 0 for 0 ≤ Ω ≤ 1, { [1 ( 1 − Ω ) 4π] M Ω Λ ≥ |( 4ΩM cos3 --cos−1 ------M- + --- for ΩM > 1. (34 ) 3 ΩM 3