Wednesday, January 11, 2017

sequences and series - What's equal this :suminftyphi(n)=1frac1phi(n)?

I'm interesting to know something about convergence of series related to the Euler totient functin, then my question here is :






Question



Is this a convergent sum :ϕ(n)=11ϕ(n) ?





Note: ϕ is Euler totient function

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