Steady state.Λ > 0k = +1 ; no ΛExpands then recollapses. Spatially closed (finite).k = −1 ; no Λk = 0 ; Λ = 0Critical densityΛ > 0 ; Λ > |Gravity|William H. McCrea, 1930s
[
"Astronomy",
"Astrophysics",
"Quantum mechanics",
"Cosmological constant",
"Friedmann–Lemaître–Robertson–Walker metric",
"Inflation (cosmology)",
"Epic of evolution",
"Cosmological perturbation theory"
]