The Princeton Colloquim: Lectures on Mathematics, Delivered September 15 to 17, 1909, Before Members of the American Mathematical Society in ... University, Princeton, N. J (Classic Reprint) - Hardcover

Bliss, Gilbert Ames

9780364008423: The Princeton Colloquim: Lectures on Mathematics, Delivered September 15 to 17, 1909, Before Members of the American Mathematical Society in ... University, Princeton, N. J (Classic Reprint)

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ISBN 10: 0364008423 ISBN 13: 9780364008423

Verlag: Forgotten Books, 2018

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Excerpt from The Princeton Colloquim: Lectures on Mathematics, Delivered September 15 to 17, 1909, Before Members of the American Mathematical Society in Connection With the Summer Meeting Held at Princeton University, Princeton, N. J

The formulation and first satisfactory proofs of these theorems, at least for the case where only two variables x, y are involved, seem to be ascribed with unanimity to Cauchy. For the implicit functions his proof rested upon the assumption that the function f should be expressible by means of a power series, and the solution he sought was also so expressible, a restriction which was later removed with remarkable insight by Dini. For a differential equation, on the other hand, Cauchy assumed only the continuity of the function g and its first derivative for y, and his method of proof, with the well-known alteration due to Lipschitz, retains to-day recognized advantages over those Of later writers.

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