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Antoni Zygmund

Antoni Zygmund
Born December 25, 1900(1900-12-25)
Died May 30, 1992 (aged 91)
Citizenship American
Nationality Polish
Fields mathematics
Institutions University of Chicago
Stefan Batory University
Alma mater Uniwersytet Warszawski
Known for singular integral operators

Antoni Zygmund (December 25, 1900 – May 30, 1992) was a Polish born American mathematician who exerted a major influence on 20th-century mathematics.



Born in Warsaw, Zygmund obtained his PhD from Warsaw University (1923) and became a professor at Stefan Batory University at Vilnius (1930–39). In 1940, during the World War II occupation of Poland, he emigrated to the United States and became a professor at Mount Holyoke College in South Hadley. From 1945 until 1947 he was a professor at the University of Pennsylvania, and from 1947 at the University of Chicago.

He was a member of several scientific societies. From 1930 until 1952 he was a member of the Polish Society of Friends of Science (TNW), from 1946 a member of the Polish Academy of Learning (PAU), from 1959 a member of the Polish Academy of Sciences (PAN), and from 1961 a member of the National Academy of Science in Washington, D.C.. In 1986 he received the National Medal of Science.

His main interest was harmonic analysis. He wrote a standard two-volume work Trigonometric Series. His students included Alberto Calderón, Paul Cohen, Nathan Fine and Elias Stein. He died in Chicago.

His work has had a pervasive influence in many fields of mathematics, particularly in mathematical analysis. He wrote over 6 books. Perhaps most important was his work with Calderón on singular integral operators.

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