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arXiv · 2310.19357

Improved bounds for the two-point logarithmic Chowla conjecture

Cédric Pilatte
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Abstract

Let $λ$ be the Liouville function, defined as $λ(n) := (-1)^{Ω(n)}$ where $Ω(n)$ is the number of prime factors of $n$ with multiplicity. In 2021, Helfgott and Radziwiłł proved that $$\sum_{n\leq x} \frac{1}{n} λ(n) λ(n+1) \ll \frac{\log x}{(\log \log x)^{1/2}},$$improving earlier results by Tao and Teräväinen. We prove that $$\sum_{n\leq x} \frac{1}{n} λ(n) λ(n+1) \ll (\log x)^{1-c}$$for some absolute constant $c>0$. This appears to be best possible with current methods.

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Cédric Pilatte. 2026-08-25. Improved bounds for the two-point logarithmic Chowla conjecture. https://arxiv.org/abs/2310.19357

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