The one-sided Calderón–Zygmund weighted estimate conjecture

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Let TT be a one-sided Calderón–Zygmund operator: an operator bounded on L2L^2 with a kernel K(x,y)K(x,y) satisfying

∣K(x,y)∣≲∣x−y∣−1,x≠y,\lvert K(x,y)\rvert \lesssim \lvert x-y\rvert^{-1},\qquad x\ne y, ∣∇αK(x,y)∣≲∣x−y∣−1−α,\lvert \nabla^\alpha K(x,y)\rvert \lesssim \lvert x-y\rvert^{-1-\alpha},

for fixed 0<α≤10<\alpha\leq 1, and K(x,y)=0K(x,y)=0 when x<yx<y. For 1<p<∞1<p<\infty, let p′p' be the conjugate exponent, let ww be a weight in Ap+A_p^+, and let σ=w−1/(p−1)\sigma=w^{-1/(p-1)}. The one-sided Calderón–Zygmund weighted estimate conjecture. Then

∥T∥Lp(w)→Lp(w)≲[w]Ap+max⁡{[σ]A∞−1/p,[w]A∞+1/p′}≲[w]Apmax⁡{1,(p−1)−1}.\lVert T\rVert_{L^p(w)\to L^p(w)}\lesssim [w]_{A_p^+}\max\left\{[\sigma]_{A_\infty^-}^{1/p},[w]_{A_\infty^+}^{1/p'}\right\}\lesssim [w]_{A_p}^{\max\{1,(p-1)^{-1}\}}.

This would be a one-sided analogue of weighted bounds for Calderón–Zygmund operators and of the main results cited in the source. The paper presents it as an overarching conjecture; its resolution is not specified in the supplied text.

References

Primary source

Wei Chen, Rui Han and Michael T. Lacey, “Weighted Estimates for One Sided Martingale Transforms”, arXiv:1811.01923 (2018).

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