David Rees

We are saddened to learn that David Rees has passed away, peacefully in hospital in Exeter, aged 95.
Commalgists will know Rees’ name through the familiar expressions ‘Rees rings’, ‘Rees algebras’ and the ‘Artin–Rees Lemma’. The concept of reduction of an ideal in a local ring, introduced in a paper written jointly by Douglas Northcott and David Rees about 60 years ago, continues to be much used and frequently cited in the 21st century.