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erdos_893

Specification

Does the limit $\lim_{n\to\infty} \frac{f(2n)}{f(n)}$ tend to infinity? (Other finite limits have been ruled out by [KoLu25], see below)

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Lean 4 Statement 
theorem erdos_893 :
    answer(sorry) ↔ Tendsto (fun n : ℕ => (f (2 * n) : ℝ) / (f n : ℝ)) atTop atTop
ID: ErdosProblems__893__erdos_893
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