Abstract
Let μ be a finite Radon measure in ℝd with polynomial growth of degree n, although not necessarily n-AD regular. We prove that under some geometric conditions on μ that are closely related to rectifiability and involve the so-called β-numbers of Jones, David and Semmes, all singular integral operators with an odd and sufficiently smooth Calderón-Zygmund kernel are bounded in L2(μ). As a corollary, we obtain a lower bound for the Lipschitz harmonic capacity of a compact set in ℝd only in terms of its metric and geometric properties.
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Supported by project MTM-2010-16232 (MICINN, Spain) and partially supported by the ERC grant 320501 of the European Research Council (FP7/2007-2013), and projects MTM-2013-44304-P (MICINN, Spain) and 2014-SGR-75 (Catalonia).
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Girela-Sarrión, D. Geometric conditions for the L2-boundedness of singular integral operators with odd kernels with respect to measures with polynomial growth in ℝd. JAMA 137, 339–372 (2019). https://doi.org/10.1007/s11854-018-0075-2
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DOI: https://doi.org/10.1007/s11854-018-0075-2