Nonlinear evolution of density perturbations using approximate constancy of gravitational potential

J. S. Bagla, T. Padmanabhan

During the evolution of density inhomogeneties in an $\Omega =1$, matter dominated universe, the typical density contrast changes from $\delta \simeq 10^{-4}$ to $\delta \simeq 10^2$. However, durin…