RT Unpublished Material DB /z-wcorg/ DS http://worldcat.org ID 32895852 LA French and English. T1 Selected papers, A1 Poincaré, Henri,, YR 1873 AB Correspondence; manuscripts; notebooks; lectures; diaries; memorabilia. The bulk of the collection is correspondence, primarily incoming letters (1878-1912) with mathematicians and physicists on current work. Exchanges of particular interest include those with Sophus Lie which reveal Poincaré's thinking on the genesis of the axioms of geometry; Heinrich Hertz on Hertz's experiments on electromagnetic waves, and his interest in the three body problem of classical mechanics; correspondence on the Crémieu controversy; and ca. 150 letters (1881-1910) to Magnus Gosta Mittag-Leffler discussing theories of analytic functions, number theory, and differential equations as well as the many papers Poincaré published in Mittag Leffler's Acta Mathematica. Also contains letters from Poincaré to his family while a student at l'Ecole Polytechnique (1873-1875) and L'Ecole des Mines (1877-1879). Manuscripts and calculations are for many of his published papers in mathematics, science, and philosophy. Notebooks and lectures (1897-1899) are for his courses at the Université de Paris. Topics include elliptical functions, complex variables, linear differential equations, n-body problems, celestial mechanics, potential theory, fluid mechanics, and wireless telegraphy.