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Weak and strong type estimates for maximal truncations of Calderón-Zygmund operators on A p weighted spaces

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Abstract

We show that for 1 < p < ∞, weight wA p , and any L 2-bounded Calderón-Zygmund operator T, there is a constant C T,p such that the weak- and strong-type inequalities

$${\left\| {{T_\natural}f} \right\|_{{L^{p,\infty }}(w)}} \le {C_{T,p}}{\left\| w \right\|_{{A_p}}}{\left\| f \right\|_{{L^p}(w )}}$$
$${\left\| {{T_\natural}f} \right\|_{{L^p}(w)}} \le {C_{T,p}}\left\| w \right\|_{{A_p}}^{\max \{ 1,{{(p - 1)}^{ - 1}}}{\left\| f \right\|_{{L^p}(w)}}$$

hold, where T denotes the maximal truncations of T and \({\left\| w \right\|_{{A_p}}}\) denotes the Muckenhoupt A p characteristic of w. These estimates are not improvable in the power of \({\left\| w \right\|_{{A_p}}}\). Our argument follows the outlines of those of Lacey-Petermichl-Reguera (Math. Ann. 2010) and Hytönen-Pérez-Treil-Volberg (arXiv, 2010) and contains new ingredients, including a weak-type estimate for certain duals of T and sufficient conditions for two-weight inequalities in L p for T . Our proof does not rely upon extrapolation.

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Correspondence to Tuomas P. Hytönen.

Additional information

Research of TPH and HM supported by the Academy of Finland grants 130166, 133264 and 218418

Research of MTL, and MCR supported in part by NSF grant 0968499.

Research of TO supported by the Finnish Centre of Excellence in Analysis and Dynamics Research.

Research of ETS supported in part by NSERC

Research of IU-T supported in part by the NSF, through grant DMS-0901524.

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Hytönen, T.P., Lacey, M.T., Martikainen, H. et al. Weak and strong type estimates for maximal truncations of Calderón-Zygmund operators on A p weighted spaces. JAMA 118, 177–220 (2012). https://doi.org/10.1007/s11854-012-0033-3

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  • DOI: https://doi.org/10.1007/s11854-012-0033-3

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