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On This Day

  • 12-19-1783

    Birthdate of Charles-Julien Brianchon who in 1820 published the nine-point circle theorem. Although this theorem had been independently discovered many times, Brianchon gave the first complete proof and coined the phrase "nine-point circle."

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    Charles-Julien Brianchon
    Nine Point Circle
  • 12-19-1894

    Pioneering statistician Karl Pearson introduced the Pearson family of densities.

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    Karl Pearson
    Pearson Distributions
  • 12-19-1908

    Scientific American offered a $500 prize for "a simple explanation of the fourth dimension."

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    The Fourth Dimension
  • 12-19-1910

    Group theorist Helmut Wielandt born in Lorrach, Germany. His main interest was permutation groups.

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    Helmut Wielandt

Dummy View - NOT TO BE DELETED