William Prager

William Prager
William Prager
Born	23 May 1903; Karlsruhe, German Empire
Died	17 March 1980 (aged 76); Zürich, Switzerland
Nationality	American
Known for	Prager consistency condition; Prager trusses; Drucker–Prager yield criterion; Viscoplasticity;
Awards	Timoshenko Medal (1966); Theodore von Karman Medal (1960); Guggenheim Fellowship (1957);
	Scientific career
Fields	Applied mathematics; Mechanics;
Institutions	Brown University; Istanbul University; University of California; University of Göttingen;

William Prager, before 1940 Willy Prager (23 May 1903 – 17 March 1980), was a German-born American applied mathematician. In the field of mechanics he is well known for the Drucker–Prager yield criterion.

William Prager
Born	(1903-05-23)23 May 1903 Karlsruhe, German Empire
Died	17 March 1980(1980-03-17) (aged 76) Zürich, Switzerland
Nationality	American
Known for	Prager consistency condition Prager trusses Drucker–Prager yield criterion Viscoplasticity
Awards	Timoshenko Medal (1966) Theodore von Karman Medal (1960) Guggenheim Fellowship (1957)
Scientific career
Fields	Applied mathematics Mechanics
Institutions	Brown University Istanbul University University of California University of Göttingen