Susan Mary Rees (born 31 July 1953[1]) is a British mathematician and an emeritus professor of mathematics at the University of Liverpool since 2018, specialising in research in complex dynamical systems.
Later she worked at Institut des hautes études scientifiques and the University of Minnesota.
The citation[4] notes that, in particular, Her most spectacular theorem[5] has been to show that in the space of rational maps of the Riemann sphere of degree d ≥ 2 those maps that are ergodic with respect to Lebesgue measure and leave invariant an absolutely continuous probability measure form a set of positive measure.She also spoke at the ICM at Kyoto in 1990.
[7] In 2004, she also presented an alternative proof of the Ending Laminations Conjecture of Thurston,[8] which had been proved by Brock, Canary and Minsky shortly before.
Her father David Rees was also a distinguished mathematician, who worked on Enigma in Hut 6 at Bletchley Park.