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erdos_975.variant.n2_plus_1_strong

Specification

More concrete example for $f(n) = n^2 + 1$, where the asymptote is $\sum_{n \le x} \tau(n^2 + 1) \sim \frac{3}{\pi} x \log x + O(x)$. See Tao's blog [T].

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Lean 4 Statement 
theorem erdos_975.variant.n2_plus_1_strong :
    (fun x ↦ Erdos975Sum (X ^ 2 + 1) x - (3 / π) * x * log x) =O[atTop] id
ID: ErdosProblems__975__erdos_975.variant.n2_plus_1_strong
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