Felix Klein

Felix Klein
Born	(1849-04-25)25 April 1849 Düsseldorf (Rhine Province), Prussia
Died	22 June 1925(1925-06-22) (aged 76) Göttingen (Province of Hanover), Prussia, Germany
Alma mater	University of Bonn
Known for	Erlangen program Klein bottle Beltrami–Klein model Klein's Encyclopedia of Mathematical Sciences Kleinian group Klein four-group
Awards	De Morgan Medal (1893) Copley Medal (1912) Ackermann–Teubner Memorial Award (1914)
Scientific career
Fields	Mathematics
Institutions	Universität Erlangen Technische Hochschule München Universität Leipzig Georg-August-Universität Göttingen
Doctoral advisors	Julius Plücker and Rudolf Lipschitz
Doctoral students	List Ludwig Bieberbach Maxime Bôcher Oskar Bolza Max Brückner Frank Nelson Cole Friedrich Dingeldey Henry B. Fine Erwin Freundlich Robert Fricke Philipp Furtwängler Axel Harnack Mellen Haskell Adolf Hurwitz Edward Kasner Ferdinand von Lindemann Alexander Ostrowski Julio Rey Pastor Hermann Rothe Friedrich Schilling Virgil Snyder Edward Van Vleck Walther von Dyck Adolf Weiler Henry Seely White Alexander Witting Grace Chisholm Young
Other notable students	Edward Kasner

Felix Christian Klein (German: [klaɪn]; 25 April 1849 – 22 June 1925) was a German mathematician and mathematics educator, known for his work in group theory, complex analysis, non-Euclidean geometry, and the associations between geometry and group theory. His 1872 Erlangen program classified geometries by their basic symmetry groups and was an influential synthesis of much of the mathematics of the time.

During his tenure at the University of Göttingen, Klein was able to turn it into a center for mathematical and scientific research through the establishment of new lectures, professorships, and institutes. His seminars covered most areas of mathematics then known as well as their applications. Klein also devoted considerable time to mathematical instruction, and promoted mathematics education reform at all grade levels in Germany and abroad. He became the first president of the International Commission on Mathematical Instruction in 1908 at the Fourth International Congress of Mathematicians in Rome.