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erdos_822

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Does the set of integers of the form $n + \varphi(n)$ have positive (lower) density? [GIL24] proved this was true.

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Lean 4 Statement 
theorem erdos_822 :
    answer(True) ↔ (Set.range fun n => n + Nat.totient n).HasPosDensity
ID: ErdosProblems__822__erdos_822
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