Helmut Grunsky

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Helmut Grunsky (born July 11, 1904 in Aalen ; † June 5, 1986 in Würzburg ) was a German mathematician who dealt with function theory.

Grunsky 1968 in Eichstätt

Life

After graduating from secondary school in Aalen , Grunsky studied physics from 1922 at the Technical University of Stuttgart and from 1925 at the Technical University of Berlin-Charlottenburg, where he graduated in 1927 as a graduate engineer. He then studied mathematics at the University of Berlin, where he received his doctorate in 1932 under Ludwig Bieberbach ( New Estimations for the Conformal Mapping of Single and Multiple Connected Areas ) and qualified as a professor in 1938 ( Coefficient conditions for simple mapping meromorphic functions. Mathematical journal). From 1930 he was at the "Yearbook on the Progress of Mathematics", most recently from 1935 to 1939 as editor. In this function he has repeatedly had articles discussed by Jewish speakers. When he was finally met with massive hostility from his doctoral supervisor Ludwig Bieberbach, among others, in 1939 he resigned from the management of the yearbook.

On April 1, 1940, he joined the NSDAP for unknown reasons .

After the Second World War, during which he was in the cipher service of the Foreign Office , he was a high school teacher in Trossingen and from 1949 a lecturer in Tübingen (after having been a lecturer in Gießen in 1942). Nothing is known about its denazification . 1950/51 he was visiting professor at Washington State College in Pullman . In 1954 he became associate professor in Mainz and in 1958 full professor in Würzburg , where he retired in 1972. 1964/65 he was dean of the natural science faculty. 1963/64 he was visiting professor at the Technical University of Ankara . In 1973 and 1977/78 he was Research Consultant at Washington University in St. Louis and in 1975 visiting professor at the State University of New York in Albany.

Grunsky was known for his work on simple functions. The Grunsky inequalities characterize the coefficients of simple functions. Among other things, Charzynski and Schiffer in 1960 gave an "elementary" proof of the Bieberbach conjecture for the fourth coefficient and Pederson and Ozawa in 1968 for the sixth.

He was invited speaker at the ICM in Cambridge, Massachusetts 1950 (On Chebyshev Problems).

He had been married since 1935 and had three children.

Helmut Grunsky's scientific estate is kept in the special collections of the Lower Saxony State and University Library in Göttingen .

Fonts

  • Oliver Roth, Stephan Ruscheweyh (Eds.): Helmut Grunsky. Collected papers . Heldermann Verlag, Lemgo, Germany 2004, ISBN 978-3-88538-501-1 ( publisher's announcement ).
  • Helmut Grunsky: The general Stokes' Theorem (=  Applicable Mathematics Series . Volume 9 ). Pitman Advanced Pub. Program, Boston, MA 1983, ISBN 978-0-273-08510-2 .
  • Helmut Grunsky: Lectures on theory of functions in multiply connected domains (=  Studia mathematica: mathematical textbooks . No. 4 ). Vandenhoeck & Ruprecht, Göttingen 1978, ISBN 3-525-40143-4 (English).
  • Helmut Grunsky: Coefficient conditions for simply mapping meromorphic functions . In: Mathematical Journal . tape 45 , 1939, pp. 29-61 ( digizeitschriften.de ).
  • Helmut Grunsky: New estimates for the conformal mapping of single and multiple connected areas (=  Dissertation Friedrich-Wilhelms-Universität zu Berlin . Writings of the Mathematical Seminar and the Institute for Applied Mathematics of the University of Berlin , volume 1 , No. 4, pp. 95-140). BG Teubner, Leipzig 1932 ( uni-goettingen.de ).

literature

  • JA Jenkins : Helmut Grunsky. Annual report of the German Mathematicians Association, Volume 91 (1989), Issue 4, pp. 159–167; Digitized copy of ISSN  0012-0456
  • Gerhard Keiper, Martin Kröger (editor): Biographical Handbook of the German Foreign Service 1871–1945, Volume 2 G – K (= Foreign Office - Historical Service - Maria Keipert, Peter Grupp [ed.]: Biographical Handbook of the German Foreign Service 1871– 1945 ). Ferdinand Schöningh, Paderborn Munich Vienna Zurich 2005, ISBN 978-3-506-71841-9 , p. 129–130 , section Grunsky, Helmut (with picture) .
  • Reinhard Siegmund-Schultze: Helmut Grunsky (1904–1986) in the Third Reich: A Mathematician Torn between Conformity and Dissent . In: Oliver Roth, Stephan Ruscheweyh (Eds.): Helmut Grunsky: Collected Papers . Heldermann, Lemgo 2004, ISBN 978-3-88538-501-1 , p. XXXI – L (English).

Web links

Individual evidence

  1. ↑ cf. on this the letter from Ludwig Bieberbach to Helmut Grunsky of January 11, 1938
  2. ↑ Gerhard Keiper, Martin Kröger (editor): Biographical Handbook of the German Foreign Service 1871–1945, Volume 2 G – K (= Foreign Office - Historical Service - Maria Keipert, Peter Grupp [ed.]: Biographical Handbook of the German Foreign Service 1871 -1945 ). Ferdinand Schöningh, Paderborn Munich Vienna Zurich 2005, ISBN 978-3-506-71841-9 , p. 129–130 , section Grunsky, Helmut .
personal data
SURNAME Grunsky, Helmut
BRIEF DESCRIPTION German mathematician
DATE OF BIRTH July 11, 1904
PLACE OF BIRTH Bask
DATE OF DEATH June 5, 1986
Place of death Wurzburg