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Resumen de Upper endpoint estimates and extrapolation for commutators

Kangwei Li, Sheldy Ombrosi, Israel Pablo Rivera Rios

  • In this note we revisit the upper endpoint estimates for commutators following the line by Harboure, Segovia, and Torrea [Illinois J. Math. 41 no. 4 (1997), 676–700]. Relying upon the suitable BMO subspace suited for the commutator that was introduced in Accomazzo's PhD thesis (2020), we obtain a counterpart for commutators of the upper endpoint extrapolation result by Harboure, Macías and Segovia [Amer. J. Math. 110 no. 3 (1988), 383–397]. Multilinear counterparts are provided as well.


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