Joseph L. Doob

Joseph L. Doob
Doob in Tokyo, 1969
Born	(1910-02-27)February 27, 1910 Cincinnati, Ohio, U.S.
Died	June 7, 2004(2004-06-07) (aged 94) Urbana, Illinois, U.S.
Nationality	American
Alma mater	Harvard University (BA, MA, PhD)
Known for	Doob's martingale inequality Doob decomposition theorem
Scientific career
Fields	Mathematics
Institutions	University of Illinois at Urbana-Champaign
Doctoral advisor	Joseph L. Walsh
Doctoral students	Warren Ambrose David Blackwell Yuan-Shih Chow Paul Halmos J. Laurie Snell Mary E. Thompson

Joseph Leo Doob (February 27, 1910 – June 7, 2004) was an American mathematician, specializing in analysis and probability theory.

The theory of martingales was developed by Doob.