Consecutive primes and Beatty sequences

preprint2016arXivOpen access

Abstract

Fix irrational numbers α,α^>1α,\hatα>1 of finite type and real numbers β,β^≥0β,\hatβ\ge 0, and let BB and B^\hat B be the Beatty sequences B:=(⌊αm+β⌋)m≥1andB^:=(⌊α^m+β^⌋)m≥1. B:=(\lfloorαm+β\rfloor)_{m\ge 1}\quad\text{and}\quad\hat B:=(\lfloor\hatαm+\hatβ\rfloor)_{m\ge 1}. In this note, we study the distribution of pairs (p,p♯)(p,p^\sharp) of consecutive primes for which p∈Bp\in B and p♯∈B^p^\sharp\in\hat B. Under a strong (but widely accepted) form of the Hardy-Littlewood conjectures, we show that ∣{p≤x:p∈B and p♯∈B^}∣=(αα^)−1π(x)+O(x(log⁡x)−3/2+ε), \big|\{p\le x:p\in B\text{ and }p^\sharp\in\hat B\}\big|=(α\hatα)^{-1}π(x)+O\big(x(\log x)^{-3/2+ε}\big), where π(x)π(x) is the prime counting function.

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