Duren received in 1956 his bachelor's degree from
Harvard University and in 1960 his Ph.D. from the
Massachusetts Institute of Technology (MIT) under
Gian-Carlo Rota with thesis
Spectral theory of a class of non-self-adjoint infinite matrix operators. As a postdoc he was an instructor at
Stanford University. At the
University of Michigan, he became in 1962 an assistant professor, in 1966 an associate professor, in 1969 a professor, and in 2010 a professor emeritus. As a professor, Duren served on the thesis committee of
Ted Kaczynski. Duren was in 1968/69 at the
Institute for Advanced Study, in 1975 a visiting professor at the
Technion in Haifa, in 1964/65 a visiting scientist at
Imperial College and the
University of Paris-Sud in Orsay, in 1982 a visiting professor at the
University of Maryland and in 1982/83 at the
Mittag-Leffler Institute, the University of Paris-Sud and at the
ETH Zürich. In 1989 he was a visiting scientist at Stanford University, in 1993 at the University of Hawaii and in 1996 at the
Norwegian Institute of Technology in Trondheim. He has also been a visiting scientist in Halle, at the
Max-Planck Institute in Leipzig, at the
University of Witwatersrand, in Santiago de Chile, at the
Autonomous University of Madrid, at
Bar-Ilan University and the
Academia Sinica in Beijing. In 1976/77 he was chief editor of the
Michigan Mathematical Journal. He was a co-editor of the
American Mathematical Monthly and a
festschrift for
Frederick Gehring. Duren's research and expository writing deals with function theory and functional analysis, including
Hardy spaces,
schlicht functions,
harmonic analysis,
geometric function theory,
potential theory, and
special functions. Duren died on July 10, 2020, at the age of 85. == Awards ==