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Roth’s theorem in the primes. (English) Zbl 1160.11307

Summary: We show that any set containing a positive proportion of the primes contains a 3-term arithmetic progression. An important ingredient is a proof that the primes enjoy the so-called Hardy-Littlewood majorant property. We derive this by giving a new proof of a rather more general result of Bourgain which, because of a close analogy with a classical argument of Tomas and Stein from Euclidean harmonic analysis, might be called a restriction theorem for the primes.

MSC:

11B25 Arithmetic progressions
11N13 Primes in congruence classes
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