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On This Day

  • 9-5-1575

    Federico Commandino died in Urbino, Italy. "In the sixteenth century, Western Mathematics emerged swiftly from a millennial decline. This rapid ascent was assisted by Apollonius, Archimedes, Aristarchus, Euclid, Eutocius, Hero, Pappus, Ptolemy, and Serenus--as published by Commandino." (Edward Rosen, Dictionary of Scientific Biography)

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    Federico Commandino
  • 9-5-1667

    Giovanni Saccheri born in Genoa, Italy. He was the first to discuss the effects of denying Euclid's Fifth Postulate, the Parallel Postulate.

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    Giovanni Saccheri
    The Parallel Postulate
  • 9-5-1725

    Jean Etienne Montucla, historian of mathematics, born in Lyon, France.

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    Jean Etienne Montucla

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