Dynamics of Perturbations in Gurzadyan-Xue Cosmological Models

Perturbation theory within Newtonian approximation is presented for cosmological models with time-varying physical constants. Analytical solutions for perturbations dynamics are obtained for each Gurzadyan-Xue model with pressureless matter and radiation. It is found that perturbations grow during the entire expansion within GX models, including the curvature- and vacuum-dominated stage when they cease to grow in the standard cosmological model.