Abstract
© 2017, Fondazione Annali di Matematica Pura ed Applicata and Springer-Verlag GmbH Germany. We prove a characterization of some Lp-Sobolev spaces involving the quadratic symmetrization of the Calderón commutator kernel, which is related to a square function with differences of difference quotients. An endpoint weak type estimate is established for functions in homogeneous Hardy–Sobolev spaces H˙α1. We also use a local version of this square function to characterize pointwise differentiability for functions in the Zygmund class.
Original language | English |
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Pages (from-to) | 905-940 |
Journal | Annali di Matematica Pura ed Applicata |
Volume | 197 |
Issue number | 3 |
DOIs | |
Publication status | Published - 1 Jun 2018 |
Keywords
- Hardy space
- Sobolev space
- Square function
- Zygmund class