Rudolf Lipschitz

Rudolf Lipschitz was a German mathematician, born near Königsberg in 1832, who studied at Königsberg and Berlin, where he worked with Gustav Dirichlet, and took his doctorate in 1853. He taught at Bonn and Breslau and became the first holder of the chair of mathematics at Bonn in 1869, where he examined the dissertation of Felix Klein. He is best known in analysis for the Lipschitz continuity condition, a bound on how fast a function can change that is used throughout the theory of differential equations. He also worked on differential geometry, number theory, algebras with involution and classical mechanics.