Rainer Ansorge

Rainer Ansorge (born January 1, 1931 in Berlin ) is a German mathematician who deals with numerical mathematics and applied mathematics and was a professor at the University of Hamburg .

After the war-related interruptions in his training in the Second World War (fleeing Pomerania), Ansorge studied mathematics, for example as a truck driver (he had to support his mother after his father had fallen), an apprenticeship as a machinist and a high school diploma in Berlin in 1950 and physics and the FU Berlin and the TU Berlin with the diploma in mathematics 1956 with distinction. He then worked as a calculation engineer at the VW works in Wolfsburg and, from 1957, a scientific assistant at the Clausthal Mining Academy . In 1959 he received his doctorate there ( on controlled heating processes in cylinders ), became a lecturer in 1963 and professor in 1968 after his habilitation . From 1967 to 1969 he helped to develop the mathematics course there. From 1969 he was full professor and director of the Institute for Applied Mathematics at the University of Hamburg and director of the computer center. With the experimental physicist and first research director of DESY Peter Stähelin (1914–2014), he set up the computer science course there from 1969 to 1972. In 1996 he retired.

He deals with functional analysis of discretization methods and numerics of conservation equations.

He was several times in the Senate of the University of Hamburg (and in 1968/69 in the Senate of the Clausthal University of Technology), from 1966 to 1969 a member of the Presidium of the University Association 1973 to 1979 in the Senate of the DFG and 1979 to 1987 in the founding senate of the TU Hamburg-Harburg. From 1985 to 1998 he was on the board of GAMM and he was an honorary member of the editorial board of the journal for applied mathematics and mechanics of GAMM. He is an honorary member of the Mathematical Society in Hamburg and an honorary senator of the TU Hamburg-Harburg . He received the Medal of Honor from the Sharif University for Technology in Iran and the Charles University in Prague and is an honorary member of the VDI Working Group Vibration and Acoustics in Hamburg.

Ansorge is a member of the European Academy of Sciences (Liège) and the European Academy of Sciences and Arts (Salzburg).

Fonts

with Hans-Joachim Oberle, Kai Rothe, Thomas Sonar: Mathematics for Engineers, 3 volumes, 4th edition, Weinheim: Wiley 2011 (first Wiley-VCH 1994)
with Thomas Sonar : Mathematical models of fluid dynamics: modeling, theory, basic numerical facts; an introduction, Wiley-VCH 2009 (first edition as sole author 2003)
Difference approximations of partial initial value problems: with numerous examples, Teubner 1978
with T. Meis, Willi Törnig (editor): Iterative solutions of nonlinear systems of equations, Oberwolfach 1982, Lecture Notes in Mathematics 953, Springer 1982
Editor: Numerical Mathematics, Symposium on the occasion of the retirement of Lothar Collatz at the Institute for Applied Mathematics, Hamburg 1979, Birkhäuser 1979
with Willi Törnig (editor): Numerical Treatment of Differential Equations in Applications, Proc. Oberwolfach 1977, Springer, Lecture Notes in Mathematics 1977
with Willi Törnig (editor): Numerical, especially approximation-theoretical, treatment of functional equations, Oberwolfach 1972, Springer, Lecture Notes in Mathematics 333, 1973
with Reiner Hass: Convergence of difference methods for linear and nonlinear initial value problems, Springer, Lecture Notes in Mathematics 159, 1970

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personal data
SURNAME	Ansorge, Rainer
BRIEF DESCRIPTION	German mathematician
DATE OF BIRTH	January 1, 1931
PLACE OF BIRTH	Berlin