Mathematician:Kurt Otto Friedrichs

German applied mathematician whose major contribution was his work on partial differential equations.

Nationality
German.

History

 * Born: 28 September 1901 in Kiel, Germany
 * Died: 31 December 1982 in New Rochelle, New York, USA

Theorems and Definitions

 * Courant-Friedrichs-Lewy Condition (with Richard Courant and Hans Lewy)
 * Friedrichs' Inequality

Publications

 * 1953: Mathematical aspects of the quantum theory of fields
 * 1965: Perturbation of Spectra in Hilbert Space
 * 1971: Fluid Dynamics (with Richard Edler von Mises)
 * 1981: Spectral Theory of Operators in Hilbert Space
 * 1981: Spectral Theory of Operators in Hilbert Space