“…In support of this view, we shall show that the pseudotensor theory [1] points out to a null-energy for a Robertson-Walker-flat Universe, in a Cartesian-coordinates calculation [3, 5-9, 17-20, 23, 26, 32, 34, 40]. Next, we shall show that in spherical coordinates, we would obtain a wrong result, but see also [27][28][29][30]. Recent developments include torsion models [36], and, a paper by Xulu [39].…”