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Arthur Moritz Schoenflies (; 17 April 1853 – 27 May 1928), sometimes written as Schönflies, was a German mathematician, known for his contributions to the application of group theory to crystallography, and for work in topology. Schoenflies was born in Landsberg an der Warthe (modern Gorzów, Poland). He studied under Kummer and Weierstrass, and was influenced by Felix Klein. The Schoenflies problem is to prove that an (''n'' − 1)-sphere in Euclidean ''n''-space bounds a topological ball, however embedded. This question is much more subtle than initially appears. He studied at the University of Berlin from 1870–1875. He obtained a doctorate in 1877, and in 1878 he was a teacher at a school in Berlin. In 1880, he went to Colmar to teach. Schoenflies was a frequent contributor to Klein's encyclopedia: In 1898 he wrote on set theory, in 1902 on kinematics, and on projective geometry in 1910. He was a great-uncle of Walter Benjamin. ==Selected works== * ''Geometrie der Bewegung in synthetischer Darstellung.'' Teubner, 1886; translated by Charles Speckel as ''La Géométrie du Mouvement. Exposé synthétique.'' Gauthier-Villars 1893 * ''Einführung in die mathematische Behandlung der Naturwissenschaft.'' 1st edition, Dr. E. Wolff, 1895; 2nd editions 1931 (with Walther Nernst) * ''Entwicklung der Mengenlehre und ihrer Anwendungen.'' Teubner, 1913 (with Hans Hahn). *''Kristallsysteme und Kristallstruktur'', Teubner 1891 * ''Theorie der Kristallstruktur. Ein Lehrbuch.'' Gebr. Borntraeger, 1923. *''Einführung in die Hauptgesetze der zeichnerischen Darstellungsmethoden'', Teubner 1908, (Project Gutenberg ebook ) *Articles: ''Mengenlehre'' (1898), ''Projektive Geometrie'' (1909), ''Kinematik'' (1902), ''Kristallographie'' (with Theodor Liebisch, Otto Mügge), in Klein's encyclopedia. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Arthur Moritz Schoenflies」の詳細全文を読む スポンサード リンク
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