Felix Klein

Felix Klein was a German mathematician, born in Düsseldorf on 25 April 1849, who died in Göttingen on 22 June 1925. His synthesis of geometry as the study of the properties of a space that are invariant under a given group of transformations, known as the Erlanger Programm, profoundly influenced mathematical development. He is best known for his work in non-Euclidean geometry, for his work on the connections between geometry and group theory, and for results in function theory. His father was secretary to the head of the government in Prussia. Klein attended the Gymnasium in Düsseldorf and then entered the University of Bonn, where he studied mathematics and physics during 1865 and 1866.