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A note on fractional type integrals in the Schrödinger setting (2307.16730v1)

Published 31 Jul 2023 in math.CA

Abstract: Assume $\mathcal{L}=-\Delta+V$ is a Schr\"{o}dinger operator on $\mathbb{R}d$, where $V$ belongs to certain reverse H\"{o}lder class $RH_\sigma$ with $\sigma\geq d/2$. We consider the class of $A_{p,q}$ weights associated to $\mathcal{L}$, denoted by $A_{p,q}{\mathcal{L}}(\mathbb{R}d)$, which include the classical Muckenhoupt $A_{p,q}(\mathbb{R}d)$ weights. We obtain the quantitative $A_{p,q}{\mathcal{L}}(\mathbb{R}d)$ estimates for fractional integrals associated to the Schr\"{o}dinger operator. Particularly, the quantitative weighted endpoint bound for fractional integrals associated to the Schr\"{o}dinger operator is first established, which was missing in the literature of Li et al. \cite{LRW}. Moreover, we generalize weighted endpoint inequalities to weighted mixed weak type inequalities for fractional type integrals in the Schr\"{o}dinger setting.

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