| Birth Date: | 14 February 1926 |
| Birth Place: | Dunkirk, New York, US |
| Death Place: | Los Angeles, California, US |
| Fields: | Mathematics |
| Workplaces: | Caltech University of Iowa University of Southern California UCLA |
| Alma Mater: | Rensselaer Polytechnic Institute University of Chicago |
| Doctoral Advisor: | Irving Segal |
| Thesis Title: | Radon-Nikodym Theorems for Operator Algebras |
| Thesis Year: | 1950 |
| Doctoral Students: | William Arveson |
| Known For: | Dye's orbit equivalence theorem[1] Russo–Dye theorem |
Henry Abel Dye Jr. (1926–1986) was an American mathematician, specializing in operator algebras and ergodic theory.[2]
Dye received from Rensselaer Polytechnic Institute a bachelor's degree and in 1950 a Ph.D. from the University of Chicago. As a postdoc he was from 1950 to 1952 at California Institute of Technology (Caltech) and from 1952 to 1953 at the Institute for Advanced Study. He was from 1953 to 1956 an assistant professor at the University of Iowa, from 1956 to 1959 an associate professor at the University of Southern California (USC), and from 1959 to 1960 a full professor at the University of Iowa. From 1960 until his death in 1986 he was a full professor at the University of California, Los Angeles (UCLA).