Template:Today in Math History for June 14

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June 14, 1746 In a letter to Christian Goldbach, Leonhard Euler writes that he finds it remarkable that $i^{i}$ is a purely real number (see A049006). Also that day, Colin Maclaurin dies in Edinburgh.
June 14, 1822 Charles Babbage announces to the Royal Astronomical Society a machine, the "difference engine," for the computation of astronomical and mathematical tables. (Later on he will demonstrate it with the sequence of numbers of the form $n^{2}+n+41$ —see A005846).
June 14, 1856 Karl Weierstrass accepts an offer of a chair in Berlin.
June 14, 1903 Alonzo Church is born in Washington, D.C.

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