The weighted Muckenhoupt conjecture for the Carleson–Dunkl operator

Let α1/2\alpha\geq -1/2, p(1,)p\in(1,\infty), and let w ⁣:R[0,)w\colon\mathbb{R}\to[0,\infty) satisfy

supB(1BBw(x)x2α+1dx)(1BBw(x)p/px2α+1dx)p/p<,\sup_{B}\left(\frac{1}{|B|}\int_B w(x)|x|^{2\alpha+1}\,\mathrm{d}x\right)\left(\frac{1}{|B|}\int_B w(x)^{-p'/p}|x|^{2\alpha+1}\,\mathrm{d}x\right)^{p/p'}<\infty,

where the supremum is over all intervals BRB\subset\mathbb{R} and 1/p+1/p=11/p+1/p'=1. The weighted Carleson–Dunkl conjecture. Under this condition, there is a constant Cp,α,wC_{p,\alpha,w} such that

CαfLp(R,wx2α+1dx)Cp,α,wfLp(R,wx2α+1dx)\big\|\mathcal{C}_{\ast}^{\alpha}f\big\|_{L^p(\mathbb{R},w|x|^{2\alpha+1}\,\mathrm{d}x)}\leq C_{p,\alpha,w}\|f\|_{L^p(\mathbb{R},w|x|^{2\alpha+1}\,\mathrm{d}x)}

for every fLp(R,wx2α+1dx)f\in L^p(\mathbb{R},w|x|^{2\alpha+1}\,\mathrm{d}x). The preceding discussion shows that the known condition wApαw\in A_p^\alpha is not optimal even when p=2p=2, motivating this Muckenhoupt-type condition with the measure x2α+1dx|x|^{2\alpha+1}\,\mathrm{d}x; whether it implies the weighted inequality remains open.

Sources & referencesView supporting material

Primary source

Wojciech Słomian, “Oscillation inequalities for Carleson–Dunkl operator”, arXiv:2406.10896 (2025).

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