Paris: Gauthier-Villars, 1899. Hardcover. First Edition. 1341 pp. 4to. Blue cloth board library binding with gold embossed titling, call numbers pasted to spine. Ink library stamp on title page of volume, clean within. Text in French. Very Good.
The Gibbs–Appell equations of motion, developed independently by American scientist Josiah Willard Gibbs (1839–1903) and French mathematician Paul Appell (1855–1930), greatly improve upon the Lagrangian differential equations of motion for systems with multiple constraints and degrees of freedom.