Helmut Grunsky
Helmut Grunsky ( born July 11, 1904 in Aalen, † June 5, 1986 in Würzburg ) was a German mathematician who worked on function theory.
After graduating from the secondary school Aalen Grunsky studied from 1922 physics at the Technical University of Stuttgart and from 1925 at the Technische Hochschule Berlin- Charlottenburg, where he graduated in 1927 as a graduate engineer. He studied mathematics at the University of Berlin, where he received his doctorate in 1932 at Ludwig Bieberbach ( New estimates for conformal mapping on and multiply connected regions ) and in 1938 his habilitation ( coefficient conditions for simple imaging meromorphic functions. Mathematical Journal). From 1930 he was the " Yearbook on the progress of mathematics ," last from 1935 to 1939 as editor. In this role, he has repeatedly published articles of Jewish scientists. When he was finally treated with hostility because of, among other things by his doctor father, Ludwig Bieberbach massive, he laid in 1939, the line of the yearbook down.
On April 1, 1940 he joined the NSDAP for reasons unknown.
After the Second World War, during which he was in Encipher the Foreign Office, he was a high school teacher in Trossingen and from 1949 professor in Tübingen ( after lecturer in Giessen was in 1942 ). About his denazification is not known. 1950/51 he was a visiting professor at Washington State College in Pullman. In 1954 he became an associate professor in Mainz and in 1958 full professor in Würzburg, where he retired in 1972. 1964/65 he was Dean of the Faculty of Science. 1963/64, he was a visiting professor at the Technical University in Ankara. 1973 and 1977/78 he was a research consultant at Washington University in St. Louis in 1975 and a visiting professor of the State University of New York at Albany.
Grunsky was known for his work on simple functions. The grunskyschen inequalities characterize the coefficients of simple functions. Among other Charzyński and Schiffer 1960 we gave to one " elementary " proof of the Bieberbach conjecture for the fourth coefficient and Pederson and Ozawa 1968 for the sixth.
He was invited speaker at the ICM in Cambridge, Massachusetts, 1950.
He was married in 1935 and had three children.
Writings
- Collected Papers. Lemgo 2004.
- Lectures on theory of functions in multiply connected domains. Cambridge University Press, Göttingen 1978.
- The general Stokes theorem. Pitman, Boston 1983.
- In 1968 he gave lectures on the theory of invariants of Isay Schur for the basic teachings of Mathematical Sciences, Springer -Verlag, out.
- New estimates for the conformal mapping and a multiply connected regions. Dissertation.
- Coefficient conditions for simple imaging meromorphic functions. In: Mathematical Journal. Vol 45, 1939.