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arXiv · 2510.02059

On the $b$-ary expansion of a real number whose irrationality exponent is close to 2

Yann Bugeaud·Dong Han Kim
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Abstract

Let $b \ge 2$ be an integer and $\xi$ an irrational real number. We establishes that, if the irrationality exponent of $\xi$ is less than $2.324 \ldots$, then the $b$-ary expansion of $\xi$ cannot be `too simple', in a suitable sense. This improves the results of our previous paper [Ann. Sc. Norm. Super. Pisa Cl. Sci., 2017].

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Yann Bugeaud, Dong Han Kim. 2025-10-02. On the $b$-ary expansion of a real number whose irrationality exponent is close to 2. https://arxiv.org/abs/2510.02059

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