Entre 1881 et 1911, Gosta Mittag-Leffler et Henri Poincare echangent une correspondance reguliere. Elle couvre quasiment la carriere scientifique de Poincare. Ce volume est le premier d'une edition commentee de la correspondance de Henri Poincare. Trois autres tomes sont en cours de preparation: le second sera consacre a la correspondance de Poincare avec des physiciens, le troisieme a celle avec des mathematiciens et le dernier aux echanges administratifs et prives de Poincare.

The letters in this volume cover Poincare's multifaceted career in astronomy in its entirety, extending from the time of his first publications in 1880 to the end of his life in 1912. At a tender age, Poincare established his authority in questions of celestial mechanics, and his views were soon sought after on a vast array of questions by the leading astronomers and geodesists of his time, including C.V.L. Charlier, G.H. Darwin, H. Faye, F.R. Helmert, G. W. Hill, A. Lindstedt, A.M. Liapunov, N. Lockyer, S. Newcomb, K. Schwarzschild, and F. Tisserand. Poincare and his correspondents take...

Cet ouvrage contient les correspondances actives et passives de Jules Houel avec Joseph-Marie De Tilly, Gaston Darboux et Victor-Amedee Le Besgue ainsi qu'une introduction qui se focalise sur la decouverte de l'impossibilite de demontrer le postulat des paralleles d'Euclide et l'apparition des premiers exemples de fonctions continues non derivables.