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On This Day

  • 2-25-1670

    Maria Kirch, first woman to discover a comet (in 1702), born near Leipzig, Germany.

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    Maria Kirch
  • 2-25-1732

    Christopher Wren died. He was buried in St. Paul's Cathedral in London, which he had redesigned and rebuilt after the fire of 2 February 1766. His tomb contains the fitting epitaph, Si monumentum requiris, circumspice (If you seek a monument, look about you).

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    Christopher Wren
  • 2-25-1870

    Hermann Amandus Schwarz wrote his friend Georg Cantor a letter containing the first rigorous proof of the theorem that if the derivative of a function vanishes then the function is constant.

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    Hermann Amandus Schwarz
    Georg Cantor

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