Levesley–Salp–Velani conjecture for very well approximable points in the Cantor set

Let KK be the middle-third Cantor set, and let VWA\mathrm{VWA} denote the set of very well approximable real numbers. Then

Levesley–Salp–Velani conjecture.

dimH(VWAK)=dimH(K).\dim_H(\mathrm{VWA}\cap K)=\dim_H(K).

Levesley, Salp, and Velani established the lower bound dimH(VWAK)dimH(K)/2\dim_H(\mathrm{VWA}\cap K)\geq \dim_H(K)/2 for missing digit sets. The conjecture predicts full Hausdorff dimension for the middle-third Cantor set; its status is not resolved in the supplied source.

Sources & referencesView supporting material

Primary source

Suxuan Chen, “The Hausdorff dimension of the intersection of ψ-well approximable numbers and self-similar sets”, arXiv:2510.17096 (2025).

Additional references

2 papers in this index state this conjecture (2021–2025). The statement above is taken from the most recent of them; the others are arXiv:2101.05910.

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