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discrete cosmology cosmology newtonian approximation weak field limit newtonian potential yukawa potential dark energy dark matter cosmological constant scalar perturbation interaction range newtonian cosmology perturbation theory minkowski background vector perturbation cold dark matter astrophysics concordance model spacetime universe point-like mass gravitational potential inhomogeneous universe yukawa interaction general relativity large-scale structure gravity sub-horizon scale super-horizon scale point-like particle homogeneity scale screening length largest cosmic structures hercules-corona borealis great wall cosmological perturbations theoretical physics astronomy n-body simulation clustering cosmological perturbation cosmological simulation law of gravitation clusters of galaxies scale factor galaxy cosmological principle space galaxies relativistic dynamics isotropic universe homogeneous universe structure growth groups of galaxies