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Augustin Louis Cauchy

Augustin Louis Cauchy (August 21, 1789 – May 23, 1857) was a French mathematician and physicist who made pioneering contributions to analysis. He was one of the first to state and prove theorems of calculus rigorously, rejecting the heuristic principle of the generality of algebra of earlier authors. He almost singlehandedly founded complex analysis and the study of permutation groups in abstract algebra. He was one of the most prominent mathematicians of the first half of the nineteenth century

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