Abstract :
Centers of integral group rings are studied. The notion of a class character ring is introduced and made use of in describing centers of integral group rings. With every automorphism of a character field, associated is an automorphism of the center of an integral group ring. The norm of a central element of an integral group ring is determined and used to obtain invertibility criteria for central elements.
Keywords :
Polymer latex , drying , Film formation , morphology , surfactants , Plasticisers , Pigment volume fraction
