John Robert Ringrose (born 21 December 1932) is an English mathematician working on operator algebras who introduced nest algebras. He was elected a Fellow of the Royal Society in 1977.^[1] In 1962, Ringrose won the Adams Prize.

• (with Richard V. Kadison): Fundamentals of the Theory of Operator Algebras, 4 vols., Academic Press 1983, 1986, 1991, 1992 (2nd edn. American Mathematical Society 1997)
• Compact non self-adjoint operators, van Nostrand 1971

• Pisier–Ringrose inequality

• O'Connor, John J.; Robertson, Edmund F., "John Robert Ringrose", MacTutor History of Mathematics Archive, University of St Andrews
• John Robert Ringrose at the Mathematics Genealogy Project

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