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Erdős problem 442

Let Logx:=max{logx,1}\operatorname{Log} x := \max\{\log x, 1\}, Log2x=Log(Logx)\operatorname{Log}_2x = \operatorname{Log} (\operatorname{Log} x), and Log3x=Log(Log(Logx)).\operatorname{Log}_3x = \operatorname{Log}(\operatorname{Log}(\operatorname{Log} x)). Is it true that if ANA\subseteq\mathbb{N} is such that 1Log2xnA:nx1n \frac{1}{\operatorname{Log}_2 x} \sum_{n\in A: n\leq x} \frac{1}{n}\to\infty then (nA:nx1n)2n,mA:n<mx1lcm(n,m) \left(\sum_{n\in A: n\leq x} \frac{1}{n}\right)^2 \sum_{n, m \in A: n < m \leq x} \frac{1}{\operatorname{lcm}(n, m)}\to\infty as xx\to\infty?

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sha256:056b44a0f82cdc4cb6d9d268c7db93ad9986b9ec5fd46204a17f323aa658beb3
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sha256:0106828165051d559b62fe5c1dd01f91d31351824c6cc0503a8ee7ca5f8414a1
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sha256:8c823d621b7e1256c8e47c60a5f1c54c016a5507e6f27b2bab537f6f5f232067
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sha256:e3c86af5b56b4ca0fef782b3403f5eac7278b34d06e4949a6813272abdb97810
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sha256:a956b84c437202e5a02cc9e036a621bd14a302b34a75758115730bdbb77c52a4
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sha256:c9d14c459c518937e758918b5897dc3b22f1a55f07739afe99502f5b046c907a
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2415f78e850aeee50afdca525c6f2e0ea606f207

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