All Gs are radial as they approach their terminuses, allowing one to define a spherical polar coordinate system about each nuclear CP so that each G in the infinite set may be uniquely specified by its terminating nuclear CP index and the polar and azimuthal angles at which it terminates, i.e., G ! (𝜃, 𝜙). Thus, the independent variables of 𝜌 within an atomic basin 𝑖 are transformed from a (𝑥, 𝑦, 𝑧) to a (𝜃, 𝜙, 𝑠) coordinate system.