Hermann Witting

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Hermann Witting 1968

Hermann Witting (born May 29, 1927 in Braunschweig ; † October 5, 2010 in Freiburg im Breisgau ) was a German mathematician who primarily dealt with mathematical statistics .

Life

Witting studied from 1946 at the TU Braunschweig and the Albert-Ludwigs-Universität Freiburg , where he graduated in 1951 and received his doctorate in 1953 under Heinrich (Henry) Görtler ( improvement of H. Görtler's difference method for calculating laminar boundary layers ). He then worked as an assistant in Freiburg, where he completed his habilitation in 1957 ( on the influence of streamline curvature on the stability of laminar flows ). In 1958/59 he was on a research fellowship at the University of California, Berkeley and in 1959 a lecturer in Freiburg. After he had already held a substitute professorship at the TH Karlsruhe in 1961 (and was a visiting professor at the ETH Zurich ) he became an associate professor in Karlsruhe in 1962, but in the same year he was still a full professor at the Westphalian Wilhelms University in Münster . From 1972 he was a professor at the University of Freiburg, where he retired in 1992.

The focus of his scientific work was initially on fluid mechanics . From 1958 he turned to mathematical stochastics. By building a fruitful scientific "school" and his textbooks on mathematical statistics, he has significantly promoted the development of this area in Germany.

In 1978 and 1979 he was President of the German Mathematicians Association . In 1981 he became a member of the Heidelberg Academy of Sciences , 1991 a corresponding member of the Braunschweigische Wissenschaftliche Gesellschaft and 1968 Fellow of the Institute of Mathematical Statistics.

In 1992 he was awarded an honorary doctorate by the Mathematics and Natural Sciences Faculty of the Westphalian Wilhelms University in Münster in recognition of his outstanding services.

His "school" came from the time in Münster Konrad Behnen , Franz-Reinhold Diepenbrock , Hans-Peter Kinder , Olaf Krafft , Joachim Krauth , Georg Neuhaus , Detlef Plachky , Paul Ressel , Martin Schaefer , Norbert Schmitz and Eckart Sonnemann , from Ulrich's time in Freiburg Müller-Funk , Friedrich Pukelsheim and Helmut Rieder .

Hermann Witting 2004

Fonts

Books
  • Mathematical statistics - an introduction to theory and methods , Stuttgart: Teubner 1966, 3rd edition 1978
  • with Gerd Nölle: Applied mathematical statistics: optimal finite and asymptotic methods , Stuttgart: Teubner 1970
  • Mathematical Statistics I - Parametric Methods with Fixed Sample Size , Stuttgart: Teubner 1985
  • with Ulrich Müller-Funk: Mathematical Statistics II - Asymptotic Statistics: Parametric Models and Non-Parametric Functionals , Stuttgart: Teubner 1995
Selected items
  • Improvement of the difference method by H. Görtler for the calculation of laminar boundary layers. Z. Angew. Math. Phys. 4: 376-397 (1953).
  • About two difference methods of boundary layer theory. Arch. Math. 4, 247-256 (1953).
  • with Henry Görtler: To the Tanische Grenzschichten. Austrian Ing.-Arch. 11: 111-122 (1957).
  • About the influence of the streamline curvature on the stability of laminar flows. Arch. Ration. Mech. Anal. 2: 243-283 (1958).
  • with Henry Görtler: Some laminar boundary layer flows, calculated using a new series method. Z. Angew. Math. Phys. 9b, 293-306 (1958).
  • Using a χ² test, the classes of which are determined by ordered sampling functions. Arch. Math. 10, 468-479 (1959).
  • A generalized Pitman efficiency for nonparametric tests. Ann. Math. Stat. 31: 405-414 (1960).
  • Optimal storage capacity. Corporate research 5, 98-110 (1961).
  • with Olaf Krafft: Optimal tests and unfavorable distributions. Z. Probability Theory. Verw. Geb. 7, 289-302 (1967).
  • On the theory of the rank test. Metrika 18, 137-144 (1972)
  • with Ulrich Müller-Funk and Friedrich Pukelsheim : On the duality between locally optimal tests and optimal experimental designs. Linear Algebra Appl. 67: 19-34 (1985).
  • with Ulrich Müller-Funk and Friedrich Pukelsheim: On the attainment of the Cramér-Rao bound in Lr-differentiable families of distributions. Ann. Stat. 17, No. 4: 1742-1748 (1989).
  • with Ulrich Müller-Funk: Testing problems with nuisance parameters: Linear models under non-classical assumptions. Z. Opera. Res. 33, No. 1, 1-20 (1989).
  • Mathematical Statistics. In: A Century of Mathematics 1890–1990; Festschrift for the anniversary of the DMV, pp. 781–815, Braunschweig: Vieweg 1990
  • A conversation with Leopold Butterer. Stat. Sci. 6, No. 4: 437-447 (1991).
  • with Hans Ulrich Burger and Ulrich Müller-Funk: On locally optimal nonparametric tests. Z. Opera. Res. 36, no. 2: 163-184 (1992).
  • Rank tests for scale: Hájek's influence and recent developments. Cybernetics 31, No. 3: 269-291 (1995).
  • Nonparametric Statistics: Aspects of their Development 1957–1997 , Annual Report DMV, Volume 100, 1998, pp. 209–237

literature

Web links

personal data
SURNAME Witting, Hermann
BRIEF DESCRIPTION German mathematician
DATE OF BIRTH May 29, 1927
PLACE OF BIRTH Braunschweig
DATE OF DEATH October 5, 2010
Place of death Freiburg in Breisgau