Abstract
We show that Dahlberg's vanishing trace condition measuring the disagreement between the coefficients of two elliptic operators preserves harmonic measures whose logarithm belongs to VMO.
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Escauriaza, L. TheL pDirichlet problem for small perturbations of the Laplacian. Israel J. Math. 94, 353–366 (1996). https://doi.org/10.1007/BF02762711
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DOI: https://doi.org/10.1007/BF02762711