Karl Stein (mathematician)

Karl Stein received his doctorate with his dissertation on the topic Zur Theorie der Funktionen mehrerer komplexer Veränderlichen; Die Regularitätshüllen niederdimensionaler Mannigfaltigkeiten at the University of Münster under the supervision of Heinrich Behnke in 1937. Karl Stein was conscripted into the Wehrmacht sometime before 1942, and trained as a cryptographer to work at OKW/Chi, the Cipher Department of the High Command of the Wehrmacht. He was assigned to manage the OKW/Chi IV, Subsection a, which was a unit responsible for security of own processes, cipher devices testing, and invention of new cipher devices. He managed a staff of 11^[1] In 1955, he became professor at the Ludwig-Maximilians-Universität München and emeritated in 1981. In 1990, he received the first Cantor medal.^[2]

Stein's doctoral students included Michael Schneider [de], Otto Forster, Ivo Schneider, Gunther Schmidt and Martin Schottenloher.

• Huckleberry, Alan (2008), "Karl Stein (1913–2000)", Jahresbericht der Deutschen Mathematiker-Vereinigung, 110 (4): 195–206, arXiv:1003.6025, Bibcode:2010arXiv1003.6025H, ISSN 0012-0456, MR 2479879
• Karl Stein at the Mathematics Genealogy Project