**Pál Erdös:**born March 26, 1913 (Budapest, Hungary), died September 20, 1996 (Warsaw, Poland).

Erdös is arguably one of the greatest and most prolific mathematicians ever known. He contributed to such diverse fields as geometry, number theory, probability theory, set theory, and analysis. He is best known for his work in combinatorial mathematics. Over 1500 (many joint) papers were published during his lifetime.