Conjectured Hausdorff-measure zero-one law for algebraic points near manifolds

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Let f:dom⁡(f)⊆Rd→Rm+1\bm f:\operatorname{dom}(\bm f)\subseteq\mathbb R^d\to\mathbb R^{m+1} be the map in the source, and let ψ0,…,ψm:R+→R+\psi_0,\ldots,\psi_m:\mathbb R^+\to\mathbb R^+ be decreasing functions satisfying ψi∈O(ψj)\psi_i\in O(\psi_j) for 0≤i<d0\leq i<d and d≤j≤md\leq j\leq m. Suppose that for some κ>0\kappa>0,

κn−m+d>lim⁡t→∞ψd(κt)⋯ψm(κt)ψd(κt+1)⋯ψm(κt+1).\kappa^{n-m+d}>\lim_{t\to\infty}\frac{\psi_d(\kappa^t)\cdots\psi_m(\kappa^t)}{\psi_d(\kappa^{t+1})\cdots\psi_m(\kappa^{t+1})}.

Let gg be a dimension function with r−dg(r)r^{-d}g(r) non-increasing, and assume that f\bm f is Lipschitz continuous, Vand⁡(f)≠0\operatorname{Vand}(\bm f)\neq0, det⁡(Uf0⋯Ufm)≠0\det(U^0_{\bm f}\cdots U^m_{\bm f})\neq0, and satisfies condition~. Define

Sn,dg(ψ0,…,ψm)=∑Q=1∞Qnψd(Q)⋯ψm(Q)Qm+1−dg(ψ0(Q)⋯ψd−1(Q)Qd).S_{n,d}^g(\psi_0,\ldots,\psi_m)=\sum_{Q=1}^{\infty}Q^n\frac{\psi_d(Q)\cdots\psi_m(Q)}{Q^{m+1-d}}g\left(\frac{\psi_0(Q)\cdots\psi_{d-1}(Q)}{Q^d}\right).

Manifold Khintchine-type conjecture. The Hausdorff gg-measure of \dualapprn,f∗(ψ0,…,ψm)\dualappr_{n,\bm f}^*(\psi_0,\ldots,\psi_m) is zero if Sn,dg(ψ0,…,ψm)S_{n,d}^g(\psi_0,\ldots,\psi_m) converges, and equals \Hausdom⁡(f)\Haus{\operatorname{dom}(\bm f)} if the sum diverges.

The conjecture is presented as an improvement of a proposition on divergence for algebraic points near manifolds; the paper does not provide a resolution.

References

Primary source

Alessandro Pezzoni, “Quantitative non-divergence and lower bounds for points with algebraic coordinates near manifolds”, arXiv:2006.10790 (2020).

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