Mitchell Jay Feigenbaum (December 19, 1944 – June 30, 2019) was an American mathematical physicist. His studies in chaos theory led to the discovery of the Feigenbaum constants. He became a professor at Rockefeller University in 1986. He was given a MacArthur Fellowship in 1983. In 1986, he was awarded the Wolf Prize in Physics.
- "Mitchell Feigenbaum, physicist who pioneered chaos theory, has died". Rockefeller University. July 2, 2019. Retrieved July 3, 2019.