Abstract
We construct quasiconformal mappings in Euclidean spaces by integration of a discontinuous kernel against doubling measures with suitable decay. The differentials of mappings that arise in this way satisfy an isotropic form of the doubling condition. We prove that this isotropic doubling condition is satisfied by the distance functions of certain fractal sets. Finally, we construct an isotropic doubling measure that is not absolutely continuous with respect to the Lebesgue measure.
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L.V.K. was supported by an NSF Young Investigator award under grant DMS 0601926. J.-M.W. was supported by the NSF grant DMS 0400810.
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Kovalev, L.V., Maldonado, D. & Wu, JM. Doubling measures, monotonicity, and quasiconformality. Math. Z. 257, 525–545 (2007). https://doi.org/10.1007/s00209-007-0132-5
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DOI: https://doi.org/10.1007/s00209-007-0132-5