Helmut Röhrl

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Helmut Röhrl , also Rohrl in English (born March 22, 1927 in Straubing ; † January 30, 2014 ), was a German mathematician .

Career

Röhrl received his doctorate in 1949 at the Ludwig Maximilians University of Munich under Robert König (and Oskar Perron ) (on differential systems that arise from multiplicative classes with exponential singularities) and completed his habilitation in 1953 (Abel integrals on Riemann surfaces of finite sex). Then he was a lecturer in Würzburg from 1949 to 1951, from 1951 to 1953 in Munich, from 1953 to 1955 in Münster with Heinrich Behnke and from 1955 to 1958 again in Munich. In 1958 he went to the University of Chicago , in 1959 became an associate professor and later professor at the University of Minnesota and was from 1964 professor at the University of California, San Diego .

In addition to function theory (including the Riemann-Hilbert problem), he dealt with algebra and category theory and totally convex spaces. In 1964 he edited the new edition of the classic textbook on function theory by Adolf Hurwitz and Richard Courant .

1962/63 he was visiting professor at Harvard University , 1967/68 at Princeton University , 1972/73 at the University of Munich, at the University of Friborg, the University of Hagen , the University of Göttingen, the Technical University of Munich and in 1976 at the University of Nagoya.

Helmut Röhrl died in January 2014 after a long illness.

Fonts

  • The Riemann-Hilbert problem of linear differential equations, Mathematische Annalen, Volume 133, 1957, pp. 1-25.
  • Appendix and adaptation by Adolf Hurwitz , Richard Courant Textbook of Function Theory , Springer Verlag, 4th edition 1964
    • Appendix (pp. 551–696) in two chapters: Further mapping theorems of function theory (including quasi-conformal mapping) and holomorphic and meromorphic functions on Riemann surfaces (including Riemann-Roch theorem, Runge approximation theorem, topology and vector space bundles on Riemann surfaces, automorphic functions)
  • Holomorphic fiber bundles over Riemann surfaces, Bulletin AMS, Volume 68, 1962, pp. 125-160
  • with Pumplün Banach spaces and totally convex spaces , part 1,2, Comm. in Algebra, Vol. 12 1984, 935-1019, Vol. 13, 1985, pp. 1047-1113

Web links

Individual evidence

  1. ↑ For example, American Men and Women of Science , Thomson Gale 2004
  2. ↑ Acknowledgment by Bodo Pareigis in the bulletin no. 29 of the Friends of the Mathematical Institute of the University of Munich, June 2014, S18 f. ( online (PDF) )
  3. ^ Mathematics Genealogy Project
  4. ↑ Published in three parts, Mathematische Annalen, Volume 123, 1951, pp. 53-75, Volume 124, 1952, pp. 187-218, Volume 125, 1953, pp. 448-466
personal data
SURNAME Röhrl, Helmut
ALTERNATIVE NAMES Rohrl, Helmut
BRIEF DESCRIPTION German mathematician
DATE OF BIRTH March 22, 1927
PLACE OF BIRTH Straubing
DATE OF DEATH January 30, 2014