Rajan Dogra Transient Nature of Generalized Coulomb Gauge A Mathematical Key to Color Confinement and Mass-Gap Problems of Pure Yang Mills Field Theory (231K, pdf) ABSTRACT. In order to avoid non-locality of the action when generalized Coulomb gauge is imposed, the implementation of the non-abelian Gauss law for infinitesimal time-period over the space of gauge potentials in path-integral method of pure Yang Mills theory provides deep insight into the color confinement and mass-gap problems in the pure Yang Mills fields i.e the question of glueball spectrum.