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Person

Robert Solovay

A man with gray hair and glasses, wearing a dark suit jacket over a light green shirt, stands against a neutral background.

American mathematician (born 1938), a major figure in modern set theory. In 1964 he proved that one can consistently add to standard set theory the statement that every set of real numbers is Lebesgue measurable, assuming the existence of a so-called inaccessible cardinal. The Solovay model gives a precise picture of the world Banach-Tarski cannot inhabit and clarifies the exact role of the Axiom of Choice.

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