Saharon Shelah (Hebrew: שהרן שלח‬) is an Israeli mathematician. He is a professor of mathematics at the Hebrew University of Jerusalem and Rutgers University in New Jersey. == Biography == Shelah was born in Jerusalem on July 3, 1945. He is the son of the Israeli poet and political activist Yonatan Ratosh. He received his PhD for his work on stable theories in 1969 from the Hebrew University.Shelah is married to Yael, and has three children.Shelah planned to be a scientist while at primary school, but initially was attracted to physics and biology, not mathematics. Later he found mathemat...