Henri Poincaré - Henri Poincaré – Sur les courbes...

Rare collection of two mathematical original treatises by the eminent French mathematician Henri Poincaré: Sur les courbes définies par les équations différentielles, Parts III and IV. First editions from the Journal de Mathématiques Pures et Appliquées, published by Gauthier-Villars in Paris, 1885 and 1886. Includes: Part III, 1885: pages 167–244 Part IV, 1886: pages 151–218 In total ca. 146 pages, separately paginated Fundamental works on the qualitative theory of differential equations and dynamical systems. Original blue publisher’s wrappers with advertisements. The copy is used and in need of restoration. The pages have browned, stained, and at the uncut edges partially torn or nicked. Several gatherings are completely loose and lie loose inside the damaged wrapper. Spine partly damaged. The photos are part of the condition description.

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