"Mechanics." . . . . "Three-body problem." . . "Physics Philosophy." . . "Fluids." . . "Université de Paris." . . "Potential theory (Mathematics)" . . "Elliptic functions." . . "Ecole polytechnique (France)" . . "Geometry Foundations." . . "Radiation." . . "Leburt, A." . . "Telegraph, Wireless." . . "Differential equations, Linear." . . . "Diaries" . . . . . . "Laboratory notes" . . . . . . . . . . . . . . . . "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; discussions of theories of analytic functions, number theory, and differential equations; and 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. Travel diaries are from his 1878 trip to Norway and Sweden. Also contains publishing contracts; correspondence and documents pertaining to memberships and awards including Poincaré's election to l'Académie francaise; and memorial clippings. Correspondents include R. Blondlot, Thomas Craig, George Howard Darwin, Charles Hermite, William Thomson (Lord Kelvin), A. Leburt, and Alfred Potier." . . . . . "Selected papers"@en . "Selected papers" . . . . . . . . . . . "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."@en . . . . . . . . . "Electromagnetic waves Experiments." . . "Functions of complex variables." . . "Analytic functions." . . "Fluid mechanics." . . "École nationale supérieure des mines de Paris." . . "Number theory." . . "Mathematics Study and teaching." . . "Differential equations." . . "Many-body problem." . . "Metaphysics." . . "Celestial mechanics." . .