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erdos_158.B22

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Let `A` be an infinite `B₂[2]` set. Must `liminf |A ∩ {1, ..., N}| * N ^ (- 1 / 2) = 0`?

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Lean 4 Statement 
theorem erdos_158.B22 : answer(sorry) ↔ ∀ A : Set ℕ, A.Infinite → B2 2 A →
    liminf (fun N : ℕ => (A ∩ .Iio N).ncard * (N : ℝ) ^ (- 1 / 2 : ℝ)) atTop = 0
ID: ErdosProblems__158__erdos_158.B22
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