Paul Halmos

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Paul Richard Halmos (Hungarian: Halmos Pál [ˈhɒlmoʃ paːl]; 3 March 1916 – 2 October 2006) was a Hungarian-born American mathematician and probabilist who made fundamental advances in the areas of mathematical logic, probability theory, operator theory, ergodic theory, and functional analysis (in particular, Hilbert spaces). He was also recognized as a great mathematical expositor. He has been described as one of The Martians.

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