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Upper endpoint estimates and extrapolation for commutators
Kangwei Li, Sheldy Ombrosi, Israel P. Rivera-Ríos
In this note we revisit the upper endpoint estimates for commutators following the line by Harboure, Segovia and Torrea. Relying upon the suitable BMO subspace suited for the commu…
The -to- Compactness of Commutators with
Tuomas Hytönen, Kangwei Li, Jin Tao +1
Let , , and be a non-degenerate Calderón--Zygmund operator. We show that the commutator is compact from to…
Exotic Calderón-Zygmund operators
Tuomas Hytönen, Kangwei Li, Henri Martikainen +1
We study singular integral operators with kernels that are more singular than standard Calderón-Zygmund kernels, but less singular than bi-parameter product Calderón-Zygmund kernel…
Multiresolution analysis and Zygmund dilations
Tuomas Hytönen, Kangwei Li, Henri Martikainen +1
Zygmund dilations are a group of dilations lying in between the standard product theory and the one-parameter setting - in $\mathbb{R}^3 = \mathbb{R} \times \mathbb{R} \times \math…