Dimension conjecture for same-prime-divisor approximation on generalized Cantor sets

Let C(b,D)C(b,D) be a generalized Cantor set with Hausdorff dimension cgammacgamma, where bb and tt have the same prime divisors, DD contains at least one of 00 and b1b-1, and clambdaψclambda_{\psi} denotes the approximation exponent used in the source, with clambdaψ1clambda_{\psi}\geq 1. Same-prime-divisor dimension conjecture.

dimH(Wt(ψ)C(b,D))=γλψ.\dim_{\rm H}\bigl(W_t(\psi)\cap C(b,D)\bigr)=\frac{\gamma}{\lambda_{\psi}}.

This conjecture asserts that, in the same-prime-divisor case, the Hausdorff dimension depends only on the Cantor-set dimension and the approximation exponent. The source motivates it by bounds involving the parameters calpha1calpha_1 and calpha2calpha_2.

Sources & referencesView supporting material

Primary source

Bing Li, Ruofan Li and Yufeng Wu, “Zero-full law for well approximable sets in missing digit sets”, arXiv:2302.03936 (2024).

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