Domingo-Salazar–Lacey–Rey weighted weak-type conjecture for the intrinsic square function

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Let Sint⁡S_{\operatorname{int}} be the intrinsic square function and let w∈A2w\in A_2 be a Muckenhoupt weight, with characteristics [w]A2[w]_{A_2} and [w]A∞[w]_{A_{\infty}}. The weighted weak space is denoted by L2,∞(w)L^{2,\infty}(w). Domingo-Salazar–Lacey–Rey conjecture. For w∈A2w\in A_2,

∥Sint⁡f∥L2,∞(w)≲[w]A21/2(1+log⁡+[w]A∞)1/2∥f∥L2(w),\lVert S_{\operatorname{int}}f \rVert_{L^{2,\infty}(w)} \lesssim [w]_{A_2}^{1/2}\left(1+\log_{+}[w]_{A_{\infty}}\right)^{1/2}\lVert f\rVert_{L^2(w)},

and this estimate is sharp. This is the critical weighted weak-L2L^2 estimate for the intrinsic square function; the source presents it as a conjecture and gives no resolution evidence.

References

Primary source

Dario Mena, Maria Carmen Reguera and Luz Roncal, “Weighted Weak Type estimates for non-integral Square Functions”, arXiv:2506.14897 (2025).

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