Clever dad.............REAL clever.........REAL Madrid..........royalty...................

Georg Cantor..........to Gregorian Calendar............German mathematician. He created set theory, which has become a fundamental theory in mathematics. Wikipedia

Born: March 3, 1845, Saint Petersburg, Russia

Died: January 6, 1918, Halle (Saale), Germany

Education: Humboldt University of Berlin (1867), ETH Zürich, Technische Universität Darmstadt

Children: Rudolph Cantor