The mass density contrast in perturbed Friedman-Lemaitre-Robertson-Walker cosmologies
arXiv:2308.03468
Abstract
We analyze the evolution of the mass density contrast in spherical perturbations of flat Friedman-Lemaitre-Robertson-Walker cosmologies. Both dark matter and dark energy are included. In the absence of dark energy the evolution equation coincides with that obtained by Bonnor within the ``Newtonian cosmology''.
5 pages