Felix Klein
Felix Klein Born (1849-04-25)25 April 1849 Düsseldorf, Rhine, Prussia, Germany Died 22 June 1925(1925-06-22) (aged 76) Göttingen, Hanover, Prussia, Germany Nationality German Fields Mathematics Institutions Universität Erlangen Technische Hochschule München Universität Leipzig Georg-August-Universität Göttingen Alma mater Rheinische Friedrich-Wilhelms-Universität Bonn Doctoral advisor Julius Plücker and Rudolf Lipschitz Doctoral students Ludwig Bieberbach Maxime Bôcher Oskar Bolza Frank Nelson Cole Henry B. Fine Erwin Freundlich Robert Fricke Philipp Furtwängler Axel Harnack Adolf Hurwitz Edward Kasner Ferdinand von Lindemann Alexander Ostrowski Julio Rey Pastor Hermann Rothe Virgil Snyder William Edward Story Edward Van Vleck Henry Seely White Alexander Witting Grace Chisholm Young Walther von Dyck Known for Erlangen program Klein bottle Klein's encyclopedia Notable awards De Morgan Medal (1893) Copley Medal (1912) Ackermann–Teubner Memorial Award (1914) Christian Felix Klein (25 April 1849 – 22 June 1925) was a German mathematician, known for his work in group theory, complex analysis, non-Euclidean geometry, and on the connections between geometry and group theory. His 1872 Erlangen Program, classifying geometries by their underlying symmetry groups, was a hugely influential synthesis of much of the mathematics of the day.