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On This Day

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Year

Month

Day

11-24-1639

Transit of Venus first observed by Jeremiah Horrocks, who described it in Venus in Sole Visa.

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Jeremiah Horrocks
Horrocks' Account of the 1639 Transit
11-24-1759

Lagrange wrote Euler that he believed that he had developed the true metaphysics of the calculus; at that time he seems to have been convinced that the use of infinitesimals was rigorous. Lagrange attempted to prove Taylor's Theorem, the power of which he was the first to observe, and then to develop the entire calculus from it.

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Joseph-Louis Lagrange
Leonhard Euler
Taylor's Theorem
11-24-1858

Dedekind discovered his cuts, representing real numbers in terms of rationals, and thereby provided the first correct definition of continuity.

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Richard Dedekind

Dummy View - NOT TO BE DELETED