Friedrich Sommer (mathematician)

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Friedrich Karl Sommer (born February 1, 1912 in Balve ; † April 7, 1998 in Bochum ) was a German mathematician who dealt with function theory .

Friedrich Sommer (center) with Claus Müller on the retirement of Behnke, Münster 1967

Sommer was the son of a district chimney sweep master and went to secondary school in Dortmund (Abitur 1931). From 1931 he studied physics, mathematics and philosophy at the University of Münster and the University of Göttingen (1932–1934). In 1936 he received his doctorate from Heinrich Behnke in Münster ( on the theory of the analytical functions of several complex variables. Areas without closed inner singularity manifolds ) and in the same year passed the teaching examination. From 1937 to 1947 he worked in the central laboratory of Siemens and Halske in telecommunications technology. Since he headed the laboratory for line planning there from 1943, which was classified as important to the war effort, he was not called up during World War II . In 1947 he returned to the university as Behnke's assistant in Münster and completed his habilitation in 1949 (The Geometry of Hypersphere Automorphisms). In 1953 he became a dietician, in 1956 an associate professor and in 1957 a scientific councilor. In 1958 he was a substitute professor at the Ludwig Maximilians University in Munich and in 1959 an associate professor at the University of Würzburg . After he had already taught applied mathematics in Münster (for example business mathematics), he arranged for a computer to be purchased in Würzburg (Zuse Z 22). In 1962 he became a full professor. In 1965 he became a full professor at the Ruhr University in Bochum , where he stayed until his retirement in 1980.

Together with Behnke, he wrote a function theory textbook that had been widespread in Germany for a long time.

Fonts

  • with Behnke's theory of the functions of a complex variable , Springer Verlag 1955 (and later editions)
  • Introduction to mathematics for students of economics , Springer Verlag 1967

Web links

Individual evidence

  1. ^ Mathematische Annalen, Volume 114, 1937, pp. 441-464
  2. Among other things, he published the German edition of the game theory by John von Neumann and Oskar Morgenstern in 1961
  3. Now in the Deutsches Museum