David John Acheson (born 1946) is a British applied mathematician at Jesus College, Oxford.
[1] He was educated at Highgate School, King's College London (BSc Mathematics and Physics, 1967) and the University of East Anglia (PhD, 1971).
He was awarded an Honorary Doctorate of Science from the University of East Anglia in 2013.
[4] In 1976, he discovered the first examples of wave over-reflection (i.e. reflection coefficient greater than unity) in a stable system.
In 1992 he discovered the 'upside-down pendulums theorem' (which is very loosely connected with the Indian Rope Trick).