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Lp-gradient estimates for the commutators of the Kato square roots of second-order elliptic operators on ℝn

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Abstract

Let L = –div(A∇) be a second-order divergent-form elliptic operator, where A is an accretive n × n matrix with bounded and measurable complex coefficients on ℝn: Herein, we prove that the commutator [b; \(\sqrt L \)] of the Kato square root \(\sqrt L \) and b with ∇bLn(ℝn)(n > 2), is bounded from the homogenous Sobolev space \(\dot L_1^p(\mathbb{R}^n)\) to Lp(ℝn) (p-(L) < p < p+(L)).

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Acknowledgements

This work was supported by National Natural Science Foundation of China (Grant No. 11471033), Program for New Century Excellent Talents in University of China (Grant No. NCET-11-0574), the Fundamental Research Funds for the Central Universities (Grant No. FRF-BR-17-001B) and the Fundamental Research Funds for Doctoral Candidate of University of Science and Technology Beijing (Grant No. FRF-BR-17-018). The authors express their gratitude to the referees for their helpful comments.

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Correspondence to Yanping Chen.

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Tao, W., Chen, Y., Xiao, Y. et al. Lp-gradient estimates for the commutators of the Kato square roots of second-order elliptic operators on ℝn. Sci. China Math. 63, 575–594 (2020). https://doi.org/10.1007/s11425-017-9310-0

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