Where a complete gravitional effect is required the mathematics is non-linear and quadratic where mass-mass interactions at a solar system level are considered. These masses are long-range dipole-dipole interactions. Here the algebraic process of linearlization involves a 'square root' of the GSFT tensor which is diagonal in structure. Hence the solution of this diagonal tensor is easily determined from linear algebra. centres of energy,stars, are 'white' holes, or centres of 'positive' energy