รวบยอดเช่นเคยครับ.
24 พฤศจิกายน
1759 : Lagrange writes Euler that he believes 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.
1858 : Dedekind discovers his cuts and thereby provides the first correct definition of continuity.
25 พฤศจิกายน
1658 : The prize committee for Pascal's cycloid problems (see 1 Oct. 1658) decides not to give the prize of sixty Spanish gold doubloons to anyone.
1731 : Euler, in a letter, introduces the letter e as the base for natural logarithms ("e denotat numerum, cuius logarithmus hyperbolicus = 1"), though he may have used the notation in his manuscripts as early as 1727.
1907 : First general meeting of the Warsaw Scientific Society. Among the 14 founders of the Society were the two mathematicians Samuel Dickstein (1851-1939) and Wladyslaw Gosiewski (1844-1911).
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