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edited Mar 27, 2022 at 9:10

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An estimate of a sum

I'm looking for an estimate of this sum $\sum_{n\leq x} \frac{\mu^2(n)}{\varphi(n)}$ where $\mu$ is the Möbius function and $\varphi$ the Euler's totient function.

Thanks a lot.

nt.number-theory analytic-number-theory

asked Mar 27, 2022 at 9:02

khattab