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Sign changes on $\sum \frac{f(n)}{\sqrt{n}}$ for random completely multiplicative $f$ https://arxiv.org/abs/2411.14447 #mathNT #mathPR

Sign changes on $\sum \frac{f(n)}{\sqrt{n}}$ for random completely multiplicative $f$

If $f: \mathbb{N} \rightarrow \{\pm1\}$ is a sample of the random completely multiplicative function, we show that almost surely $\sum_{n \le x} \frac{f(n)}{\sqrt{n}}$ changes signs infinitely many times, answering a question of Aymone.

arXiv.org
November 26, 2024 at 3:10 AM · · feed2toot · 0 · 0 · 0
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