On the way towards a nonsingular gravitational collapse  the properties of the YangMills cosmos.
Abstract
Adding gravitational selfinteraction to general relativity in an intrinsic way changes drastically the behavior of a physical system under gravitational collapse. In our analysis of this question for homogeneous and isotropic matter distributions we show that (i) theSO(1,3) gauge theory of gravity of the YangMills type has the correct Newtonian limit for the late universe, (ii) it defines intrinsically a dynamical gravitational stressenergymomentum tensorG T _{ ab }, and (iii) negative selfenergy always prevents homogeneous and isotropic matter from forming a bigbang singularity; if the present universe disposes of a positive selfenergy, pair creation on the eve of the lepton era generates sufficient gravity to stop the fatal collapse.
 Publication:

General Relativity and Gravitation
 Pub Date:
 August 1978
 DOI:
 10.1007/BF00760138
 Bibcode:
 1978GReGr...9..661C
 Keywords:

 Cosmology;
 Gravitation Theory;
 Gravitational Collapse;
 Relativity;
 Big Bang Cosmology;
 Energy Conservation;
 Isotropic Media;
 Leptons;
 SpaceTime Functions;
 Stress Tensors;
 Astrophysics;
 Cosmological Models:Relativity