Georg Cantor
Georg Ferdinand Ludwig Philipp Cantor was a mathematician who played a pivotal role in the creation of set theory, which has become a fundamental theory in mathematics. Cantor established the importance of one-to-one correspondence between the members of two sets, defined infinite and well-ordered sets, and proved that the real numbers are more numerous than the natural numbers. Cantor's method of proof of this theorem implies the existence of an infinity of infinities. He defined the cardinal and ordinal numbers and their arithmetic. Cantor's work is of great philosophical interest, a fact he was well aware of.
3 March 1845
Born on the same birth day (3 March): Alain (philosopher) • Anri Sakaguchi • Arthur Kornberg • Brian Cox (physicist) • Darren Anderton • Emil Artin • Glen E. Friedman • John Lilley • Julie Bowen • Kamal Ahmed Majumder • Khaltmaagiin Battulga • Matthew Ridgway • Xavier Bettel
Born in the same month (March 1845): Alexander III of Russia • Jakob Sverdrup (politician) • Kicking Bear • Umegatani Tōtarō I • Wilhelm Röntgen