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Extrapolation and sharp norm estimates for classical operators on weighted Lebesgue spacesDragičević, Oliver ...We obtain sharp weighted ▫$L^p$▫ estimates in the Rubio de Francia extrapolation theorem in terms of the ▫$A_p$▫ characteristic constant of the weight. Precisely, if for a given ▫$1 < r < \infty$▫ ... the norm of a sublinear operator on ▫$L^r(w)$▫ is bounded by a function of the ▫$A_r$▫ characteristic constant of the weight $w$, then for $p > r$ it is bounded on $L^p(v)$ by the same increasing function of the ▫$A_p$▫ characteristic constant of ▫$v$▫, and for ▫$p < r$▫ it is bounded on ▫$L^p(v)$▫ by the same increasing function of the ▫$\frac{r-1}{p-1}$▫ power of the ▫$A_p$▫ characteristic constant of ▫$v$▫. For some operators these bounds are sharp, but not always. In particular, we show that they are sharp for the Hilbert, Beurling, and martingale transforms.Source: Publicacions matemàtiques. - ISSN 0214-1493 (Vol. 49, no. 1, 2005, str. 73-91)Type of material - article, component partPublish date - 2005Language - englishCOBISS.SI-ID - 14141017
Author
Dragičević, Oliver |
Grafakos, Loukas |
Pereyra, María Cristina |
Petermichl, Stefanie
Topics
ekstrapolacija |
diadični paraprodukt |
martingalske transformacije |
Hilbertova transformacija |
Beurlingova transformacija |
evtrapolation |
sharp weighted estimates |
dyadic paraproddukt |
martingale transform |
Hilbert transform |
Beurling transform
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Dragičević, Oliver | 19285 |
Grafakos, Loukas | |
Pereyra, María Cristina | |
Petermichl, Stefanie |
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