Erd?s· Parr (Paul Elder in English? S), born in1965438+on March 26th, 2003, died in Warsaw, Poland on September 20th, 1996. As a child prodigy, he published 1475 papers and cooperated with 51person, ranking first among historical mathematicians. Ordos is doomed. As a Jew, he was persecuted by the Nazis and fled abroad. In the 1950s, he was suspected of being pro-China because of his correspondence with China, and was expelled from the United States by McCarthyists. Since then, he has been wandering all his life. Ordos has never been married and has no fixed occupation. He works 18 or 19 hours a day and travels around the world all year round, discussing mathematical problems with his colleagues in the mathematical field. Even in his old age, he was still keen on guessing and proving, and devoted his life to mathematics.