Search engine: DuckDuckGo_DE | Query: felix klein | Position: 17
URL: https://en.wikipedia.org/wiki/Felix_Klein
Title: Felix Klein - Wikipedia
Description: Felix Christian Klein (/ k l a ɪ n /; [1] German:; 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 ...
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