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Kurt Otto Friedrichs

Born September 28, 1901(1901-09-28)
Kiel, Germany
Died December 31, 1982 (aged 81)
New Rochelle, New York
Nationality Flag of Germany.svg German, Flag of the United States.svg American
Fields Applied Mathematics
Institutions Technische Universität Braunschweig, Courant Institute
Alma mater Georg-August-Universität Göttingen, (Ph.D., 1925)
Doctoral advisor Richard Courant
Doctoral students Peter Lax, Wolfgang Wasow, Eugene Isaacson
Known for CFL Condition, Lax–Friedrichs method
Notable awards National Medal of Science (1976)

Kurt Otto Friedrichs (September 28, 1901 – December 31, 1982) was a noted mathematician. He was the co-founder of the Courant Institute at New York University and recipient of the National Medal of Science.[1]

Kurt Otto Friedrichs, a well-known mathematician in the twentieth century, was born in Kiel, Germany on September 28, 1901. His family soon moved to Düsseldorf, where he grew up. He attended several different universities in Germany studying the philosophical works of Heidegger and Husserl, but finally decided that mathematics was his real calling. During the 1920s, Friedrichs pursued this field in Göttingen, which had a renowned Mathematical Institute under the direction of Richard Courant. Courant became a close colleague and lifelong friend of Friedrichs.

In 1931, Friedrichs became a full professor of mathematics at the Technische Hochschule in Braunschweig. In early February 1933, a few days after Hitler became the Chancellor of Germany, Friedrichs met and immediately fell in love with a young Jewish student, Nellie Bruell. Their relationship became increasingly challenging and difficult because of the anti-Semitic laws of Hitler's government. In 1937, both Friedrichs and Nellie Bruell managed to emigrate separately to New York where they finally married. Their long and very happy marriage produced five children.[2]

Courant had left Germany in 1933 and had founded an institute for graduate studies in mathematics at New York University. Friedrichs joined him when he arrived in 1937 and remained there for forty years. He was instrumental in the development of the Courant Institute of Mathematical Sciences, which eventually became one of the most distinguished research institutes for applied mathematics in the world. Friedrichs died in New Rochelle, New York on December 31, 1982.

Friedrichs' greatest contribution to applied mathematics was his work on partial differential equations. He also did major research and wrote many books and papers on existence theory, numerical methods, differential operators in Hilbert space, non-linear buckling of plates, flows past wings, solitary waves, shock waves, combustion, magneto-fluid dynamical shock waves, relativistic flows, quantum field theory, perturbation of the continuous spectrum, scattering theory, symmetric hyperbolic equations.[3]

A member of the National Academy of Sciences since 1959, Friedrichs received many honorary degrees and awards for his work. There is a student prize named after Friedrichs at NYU. In November 1977, he received the National Medal of Science from President Jimmy Carter "for bringing the powers of modern mathematics to bear on problems in physics, fluid dynamics, and elasticity."

Contents

Selected Books

  • R. von Mises and K. O. Friedrichs, Fluid Dynamics, Springer-Verlag (1971).
  • K. O. Friedrichs, Pertubation of Spectra in Hilbert Space, American Mathematical Society (1965).
  • K. O. Friedrichs, Mathematical aspects of the quantum theory of fields, Interscience (1953).
  • K. O. Friedrichs, Spectral Theory of Operators in Hilbert Space, Springer-Verlag (1981).

References

Bibliography

External links

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