Antoni Zygmund

Antoni Szczepan Zygmund was a Polish American mathematician, born in Warsaw on 26 December 1900, who worked mostly in mathematical analysis, including harmonic analysis, and is considered one of the greatest analysts of the 20th century. He studied at the University of Warsaw under representatives of the Warsaw School of Mathematics, obtained his doctorate there in 1923 with a thesis on the Riemannian theory of trigonometric series written under the formal supervision of Stefan Mazurkiewicz, and was influenced by Aleksander Rajchman. A Rockefeller Foundation scholarship took him to Oxford and Cambridge in 1929, where he collaborated with Raymond Paley, G. H. Hardy and others. Together with his doctoral student Alberto Calderón he created the Chicago school of mathematical analysis, and he was awarded the National Medal of Science in 1986.