“…Based on prior experience with quadratic forms as cost functions arising in optimization problems whose solutions are useful in navigation applications ( [2][3][4][5] (endorsed in [6]), [7][8][9]) and practice in having also provided two timely, critical counterexamples [10] to the methodology used in establishing a recent gravity model, we recognized the underlying problem posed in [1] to be a familiar minimization of a convex paraboloidal function, y ¼ f(x), going from Euclidean n-space x to a scalar y (i.e., f : E n ? R, where the linear weighting coefficients of [1, Eq.…”