William J. Ellison

William John Ellison (1943 - 16 March 2022[1]) was a British mathematician who worked on number theory.

Ellison studied at the University of Cambridge, where he earned his bachelor's degree and then, after spending the academic year 1969/70 at the University of Michigan, his PhD in 1970 under John Cassels with thesis Waring's and Hilbert's 17th Problems.

[2] Subsequently, he became a postdoc at the University of Bordeaux.

In 1972 he received the Leroy P. Steele Prize and a Lester Randolph Ford Award for his article "Waring's Problem“,[3] an exposition of Waring's problem