Strong gravity with torsion: some cosmological deduction

The density of total angular momentum of the universe is evaluated introducing spin and torsion into the strong gravity theory and using the large number hypothesis of Dirac: on this ground we find a relation between spin and radius of the universe and we show that, if angular momentum is variable in time according to Dirac's law, also Trautman's minimal radius is not an absolute concept, but it depends on the epoch. (author)