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arXiv · 2403.02792

The summatory function of the M\"obius function involving the greatest common divisor

Isao Kiuchi·Sumaia Saad Eddin
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Abstract

Let $\gcd(m,n)$ denote the greatest common divisor of the positive integers $m$ and $n$, and let $\mu$ represent the M\" obius function. For any real number $x>5$, we define the summatory function of the M\" obius function involving the greatest common divisor as $ S_{\mu}(x) := \sum_{mn\leq x} \mu(\gcd(m,n)). $ In this paper, we present an asymptotic formula for $S_{\mu}(x)$. Assuming the Riemann Hypothesis, we delve further into the asymptotic behavior of $S_{\mu}(x)$ and derive a mean square estimate for its error term. Our proof employs the Perron formula, Parseval's theorem, complex integration techniques, and the properties of the Riemann zeta-function.

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Isao Kiuchi, Sumaia Saad Eddin. 2024-03-05. The summatory function of the M\"obius function involving the greatest common divisor. https://arxiv.org/abs/2403.02792

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