The great Hungarian mathematician Paul Erdős was born in Budapest on March 26, 1913. He died alone in a hospital room in Warsaw, Poland, on Friday afternoon, September 20, 1996. It was sad and ironic that he was alone, because he probably had more friends in more places than any mathematician in the world. He was in Warsaw for a conference. Vera Sós had also been there, but had gone to Budapest on Thursday and intended to return on Saturday with András Sárközy to travel with Paul to a number theory meeting in Vilnius. On Thursday night, Erdős felt ill and called the desk in his hotel. He was having a heart attack and was taken to a hospital, where he died about 12 h later. No one knew he was in the hospital. When Paul did not appear at the meeting on Friday morning, one of the Polish mathematicians called the hotel. He did not get through, and no one tried to telephone the hotel again for several hours. By the time it was learned that Paul was in the hospital, he was dead.