Cosmology constrains gravitational four-fermion interaction
  If torsion exists, it generates gravitational four-fermion interaction
(GFFI). This interaction gets dominating on the Planck scale. If one confines
to the regular, axial-axial part of this interaction, the results do not comply
with the Friedmann-Robertson-Walker (FRW) cosmology for the spatial flat or
closed Universe. In principle, the anomalous, vector-vector interaction could
restore the agreement.
