Gauss in his famous memoir on the **hypergeometric** series F a, 0, y, x) = I+a_(3(3x- ?a(a+1)Q(3+I)x2 {-..

We have memoirs relating to the proof of the theorem that every numerical equation has a real or imaginary root, the memoir on the **Hypergeometric** Series, that on Interpolation, and the memoir Determinatio attractionis - in which a planetary mass is considered as distributed over its orbit according to the time in which each portion of the orbit is described, and the question (having an implied reference to the theory of secular perturbations) is to find the attraction of such a ring.