Theodor Schneider (mathematician)

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Theodor Schneider 1970

Theodor Schneider (born May 7, 1911 in Frankfurt am Main , † October 31, 1988 in Freiburg im Breisgau ) was a German mathematician who is particularly known for his proof of Gelfond-Schneider's theorem. This theorem says that the power of an algebraic number other than zero or one with an irrational exponent is a transcendent number .


Theodor Schneider studied from 1929 to 1934 in Frankfurt am Main and solved in his dissertation in 1934 at Carl Ludwig Siegel , the seventh Hilbert problem , which has since also Gelfond-Schneider Theorem is named after him and Alexander Gelfond , who solved it simultaneously. Hilbert himself had placed this problem in its difficulty above the Fermat hypothesis and the Riemann hypothesis . In 1935 he was an unscheduled assistant at the University of Frankfurt, but because of political unreliability he was refused his habilitation (he had become a member of the SA in order to get a job at the university, but did not attend the prescribed political events). In Frankfurt he was denied his habilitation in 1938 without giving any reason. He then went to Göttingen as an assistant (from 1939) to Carl Ludwig Siegel , where he completed his habilitation in 1939, became a lecturer in 1940 (without diets) and, apart from an interruption due to military service from 1940 to 1945, remained in the weather service until 1953. In 1945 he became assistant and private lecturer in Göttingen and in 1951 senior assistant. In 1947/48 he represented a professor in Münster . From 1953 to 1959 he was a professor in Erlangen and finally from 1959 until his retirement in 1976 in Freiburg . At the beginning of his time in Freiburg he was director of the Mathematical Research Institute Oberwolfach from 1959 to 1963 .

From 1970 he was a corresponding member of the Göttingen Academy of Sciences. In 1984 he received the golden doctoral certificate in Frankfurt.

PhD students

PhD students at Theodor Schneider were:


  • Introduction to the theory of transcendent numbers , Springer 1957 (French translation 1959)
  • Transcendence studies of periodic functions , part 1,2, Journal für Reine und Angewandte Mathematik, Vol. 172, 1934, pp. 65–69, 70–74, Online: Part 1 , Part 2 (his dissertation, in which he wrote the seventh Hilbert Guess solved)


Web links

Individual evidence

  1. Schneider: Transzendenzuntersuchungen periodischer functions , part 1,2, Journal für Reine und Angewandte Mathematik, Vol. 172, 1934, pp. 65–69, 70–74
  2. Wolfgang Schwarz, Jürgen Wolfart On the History of the Mathematical Seminar of the University of Frankfurt , 2002, pp. 29, 83. Schneider was also not allowed to go to the 1936 International Mathematicians Congress in Oslo , despite his scientific breakthrough.
  3. ^ The Mathematics Genealogy