Unified weighted-condition conjecture for the multilinear maximal operator

Let mm be a positive integer, let w=(w1,,wm)A1\vec{w}=(w_1,\ldots,w_m)\in A_{\vec{1}}, let vv be a weight with v1/mAv^{1/m}\in A_{\infty}, and define

ν=w11/mwm1/m.\nu=w_1^{1/m}\cdots w_m^{1/m}.

Unified weighted-condition conjecture. There is a constant CC such that

M(f)(x)vL1/m,(νv1/m)Ci=1mfiL1(wi).\left\|\frac{\mathcal{M}(\vec f\,)(x)}{v}\right\|_{L^{1/m,\infty}(\nu v^{1/m})}\leq C\prod_{i=1}^m\|f_i\|_{L^1(w_i)}.

This would unify the two sufficient conditions already obtained: wA1\vec w\in A_{\vec 1} with νv1/mA\nu v^{1/m}\in A_\infty, and wiA1w_i\in A_1 for every ii with vAv\in A_\infty. The supplied status evidence says that this fact was proved in Remark 7.5 of the cited work, so the conjecture is solved.

Sources & referencesView supporting material

Primary source

Kangwei Li, Sheldy J. Ombrosi and Belén Picardi, “Weighted mixed weak-type inequalities for multilinear operators”, arXiv:1705.09206 (2017).

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