Henri-Léon Lebesgue


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French mathematician who revolutionized the theory of integration. Building on the work of earlier French mathematicians on the notion of measure, he developed the Lebesgue integral, one of the outstanding concepts in modern analysis. It generalizes the Riemann integral, which can deal only with continuous functions and other functions not too unlike them. His two major texts on the subject were published in the first few years of this century.

Subjects: Mathematics.

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