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| Main Authors: | , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2511.02106 |
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Table of Contents:
- The Robin criterion states that the Riemann hypothesis is equivalent to the inequality $σ(n) < e^γn \log \log n$ for all $n>5040$, where $σ(n)$ is the sum of divisors of $n$, and $γ$ is the Euler--Mascheroni constant. Define the family of functions \[ σ^{[k]} (n):=\sum_{[d_1,\dots,d_k]=n}d_1\dots d_k \] where $[d_1, \dots, d_k]$ is the least common multiple of $d_1, \dots, d_k$. These functions behave asymptotically like $σ(n)^k$ as $k\to\infty$. We prove the following analogue of the Robin criterion: for any $k \geq 2$, the Riemann hypothesis holds if and only if $σ^{[k]} (n) < \frac{(e^γn \log \log n)^k}{ζ(k)}$ for all $n > 2162160$, where $ζ$ is the Riemann zeta function.