1913 – Born on the 26th of March in Budapest, Hungary. 1934 – He was awarded a doctorate in mathematics. – He moved to Manchester, England to be a guest lecturer. 1938 – He accepted his first American position as a scholarship holder at Princeton University, Princeton, New Jersey, United States. 1952 – He was denied with Hungarian citizenship during the McCarthy communist. 1971 – He took amphetamines. 1973 – He exiled himself voluntarily from Hungary as a principled protest against his country’s policy of denying entry to Israelis. 1996 – He died on the 20th of September because of heart attack while attending a conference in Warsaw, Poland.