The third volume includes the solution of several dynamical problems by means of the calculus of variations; some papers on the integral calculus; a solution of a Fermat's problem: given an integer which is not a perfect square, to find a number such that is a perfect square; and the general differential equations of motion for three bodies moving under their mutual attractions.
The third volume includes the solution of several dynamical problems by means of the calculus of variations; some papers on the integral calculus; a solution of a Fermat's problem: given an integer which is not a perfect square, to find a number such that is a perfect square; and the general differential equations of motion for three bodies moving under their mutual attractions