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Template:Today in Math History for October 15
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Calendar of Today in Math History for October
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- October 15, 1582 was the first day of the Gregorian calendar in Italy. It was a Thursday preceded by Wednesday, October 4, 1582.
- October 15, 1608 Evangelista Torricellis is born in Faenza.
- October 15, 1965 Abraham Fraenkel dies in Jerusalem.