2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/195733Perturbation theory within Newtonian approximation is presented for cosmological models with varying physical constants. Analytical solutions for perturbations dynamics are obtained for each Gurzadyan-Xue model with pressureless matter and radiation. We found that perturbations grow during entire expansion within GX models, including curvature- and vacuum-dominated stage when they cease to grow in the standard cosmological model.AstrophysicsGeneral Relativity and Quantum Cosmologytext