> as lemmas

a. In logistic line, logistic spiral = logarithmic. Also = pertaining to a logarithmic curve, e.g. logistic semi-ordinate. logistic curve: a logarithmic curve; also [after French logistique (P.-F. Verhulst 1845, in Nouv. Mém. de l'Acad. R. des Sci. et Belles-Lettres de Bruxelles XVIII. 8)] , a curve described by the equation y = K/(1 + Ae^a−bt), where K, A, a, and b are constants, which approximates an exponential curve for small values of t, has a point of inflection at t = a/b, and as t increases approaches y = K asymptotically. Hence logistic growth, logistic law, etc.