Higher-dimensional inhomogeneous Hausdorff-measure divergence conjecture

Let m,d1m,d\geq1 be integers, let Ψ:Zm(0,)\Psi:\mathbb Z^m\to(0,\infty), and let \WWΨ,\bfthetamd\Imd\WW^{md}_{\Psi,\bftheta}\subset\I^{md} be the associated inhomogeneous multiplicative approximation set. Let ff be a dimension function satisfying the source's stated hypotheses for some s(md1,md)s\in(md-1,md) and C>0C>0. Define

qZmqmdΨmd+1(q)f(Ψ(q)q).\sum_{\mathbf q\in\mathbb Z^m}|\mathbf q|^{md}\Psi^{-md+1}(\mathbf q)f\left(\frac{\Psi(\mathbf q)}{|\mathbf q|}\right).

Higher-dimensional Hausdorff-measure divergence conjecture. If Ψ(q)=ψ(q)\Psi(\mathbf q)=\psi(|\mathbf q|) for a monotonically decreasing ψ:N(0,)\psi:\mathbb N\to(0,\infty), this series diverges, and xxmd+1f(x)x\mapsto x^{-md+1}f(x) is monotonically increasing, then

\HHf(\WWΨ,\bfthetamd\Imd)=.\HH^f(\WW^{md}_{\Psi,\bftheta}\cap\I^{md})=\infty.

The paper gives the corresponding convergence implication as a zero-measure result and explains that the divergence claim does not follow directly from the Slicing Lemma. It is therefore posed as an open complementary problem.

Sources & referencesView supporting material

Primary source

Mumtaz Hussain and David Simmons, “The Hausdorff measure version of Gallagher's theorem – closing the gap and beyond”, arXiv:1612.00139 (2017).

Progress summary

Never refreshed

Nothing recorded yet. Refresh searches the literature and the public web for attempts on this problem, and writes the first summary here.

Solutions 0

No solutions have been posted yet.