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Ferrari, Ludovico

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Ferrari, Ludovico (1522–1565)

Italian mathematician. His solution, at the age of 15, to a specific quartic equation was published by Girolamo Cardano and credited to Ferrari. He subsequently became professor of mathematics at Bologna.

He was employed as a servant in the Cardano household when he solved the quartic equation, x4 + ax2 + b = cx, where a, b, and c are positive. When Tartaglia accused Cardano of stealing his solution of the cubic equation, Ferrari, remembering Cardano's fairness to him, challenged Tartaglia to a public disputation.



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