A Note on the Sum-Product Problem and the Convex Sumset Problem

Adam Cushman

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arXiv · 2512.13849

A Note on the Sum-Product Problem and the Convex Sumset Problem

Adam Cushman

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Abstract

We provide a new exponent for the Sum-Product conjecture on $\mathbb{R} $. Namely for $A \subset \mathbb{R}$ finite, \[ \max \left\{ \left\lvert A+A \right\rvert , \left\lvert AA \right\rvert \right\} \gg_{\epsilon} \left\lvert A \right\rvert ^{\frac{4}{3} + \frac{10}{4407} - \epsilon} .\] We also provide new exponents for $A \subset \mathbb{R} $ finite and convex, namely \[ \left\lvert A+A \right\rvert \gg_{\epsilon} \left\lvert A \right\rvert ^{\frac{46}{29} - \epsilon}, \] and \[ \left\lvert A-A \right\rvert \gg_{\epsilon} \left\lvert A \right\rvert ^{\frac{8}{5} + \frac{1}{3440} -\epsilon} .\]

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Adam Cushman. 2025-12-15. A Note on the Sum-Product Problem and the Convex Sumset Problem. https://arxiv.org/abs/2512.13849

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