The gravitational stability of Friedmann metric with respect to homogeneous and isotropic perturbations in Einstein-Cartan cosmology is used together with the COBE data to place a limit on the spin-torsion primordial density fluctuation.Cosmological perturbations in Bianchi type III models are shown to have no contributions from torsion at the early stages of the Universe.
Constraints on the topology of the universe from the 2-yr COBE data
Testing the effect of geodesic mixing with COBE data to Reveal the Curvature of the Universe
The Limits on Cosmological Anisotropies and Inhomogeneities from COBE Data
