I first met John at his Ph. D. oral (I was one of the examiners). His thesis makes the Dirac bra and ket notation rigorous, in so far as that is possible. He wisely left the subject, and has since pursued a single-minded research career devoted to analysing the consequences of locality in quantum mechanics, as advocated by Haag. He has many deep results, especially with S. Doplicher.
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© by Ray Streater 6/6/00.