“…[3] for an extensive discussion), is quite powerful and has been used in various branches of theoretical physics. In cosmology, when considering homogeneous and isotropic models (a 1-dimensional problem) it can be used, for instance, to obtain effective models arising from 4-dimensional [4] and d-dimensional Einstein-Yang-Mills-Higgs theories [5]. For the latter case, one considers for instance, G ext(int) = SO(4) (SO(d + 1)) and…”