16 ธันวาคม
1627 : Cavalieri announced to Galileo and Cardinal Borromeo that he had completed his Geometria, which contains his method of indivisibles, now known as Cavalieri's principle.
1799 Gauss writes Wolfgand Bolyai that he was sorry they had not discussed the thory of parallels during their student days together at Gottingen (1796-1798)
1861 : Weierstrass, who for twelve years had endured painful attacks of vertigo, suffered a complete collapse of his health due to overwork. Henceforth, he always lectured while seated, consigning the blackboard work to an advanced student. Nevertheless, he eventually became a recognized master teacher.
17 ธันวาคม
???? : Joseph Henry, American physicist, born.
18 ธันวาคม
1799 : Jean Etienne Montucula, historian of mathematics, died
|