# cosmological constant

02 Jun 2021Why is \(\ddot{a}/a\) equal to \((\dot{a}/a)^2\) for a flat FLRW-cosmology with only a cosmological constant?

Why is \(\ddot{a}/a\) equal to \((\dot{a}/a)^2\) for a flat FLRW-cosmology with only a cosmological constant?