Which of these mathematicians was born at an earlier date, Georg Cantor or Grigory Margulis?
Georg Cantor Georg Ferdinand Ludwig Philipp Cantor ( ; ] ; March 3 [O.S. February 19] 1845  – January 6, 1918) was a German mathematician. He invented 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. In fact, 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 of which he was well aware.
Grigorios Maraslis Grigorios Maraslis (Greek: Γρηγόριος Μαρασλής , Russian: Григорий Григорьевич Маразли ; 25 July 1831 – 1 May 1907) was an official of the Russian Empire and long-time mayor of Odessa (1878–1895) of Greek origin. A noted philanthropist, he sponsored many buildings and educational institutions both in Odessa and in various cities in Greece and for the Greek communities of the Ottoman Empire.