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On the dimension of p-harmonic measure in space
Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Mathematics, Analysis and Applied Mathematics.
2013 (English)In: Journal of the European Mathematical Society (Print), ISSN 1435-9855, E-ISSN 1435-9863, Vol. 15, no 6, 2197-2256 p.Article in journal (Refereed) Published
Abstract [en]

Let Omega subset of R-n, n >= 3, and let p, 1 < p < infinity, p not equal D 2, be given. In this paper we study the dimension of p-harmonic measures that arise from nonnegative solutions to the p-Laplace equation, vanishing on a portion of partial derivative Omega, in the setting of delta-Reifenberg flat domains. We prove, for p >= n, that there exists (delta) over tilde = (delta) over tilde (p, n) > 0 small such that if Omega is a delta-Reifenberg flat domain with delta < <(delta)over tilde>, then p-harmonic measure is concentrated on a set of sigma-finite Hn-1-measure. We prove, for p >= n, that for sufficiently flat Wolff snowflakes the Hausdorff dimension of p-harmonic measure is always less than n - 1. We also prove that if 2 < p < n, then there exist Wolff snowflakes such that the Hausdorff dimension of p-harmonic measure is less than n - 1, while if 1 < p < 2, then there exist Wolff snowflakes such that the Hausdorff dimension of p-harmonic measure is larger than n - 1. Furthermore, perturbing off the case p = 2; we derive estimates for the Hausdorff dimension of p-harmonic measure when p is near 2.

Place, publisher, year, edition, pages
2013. Vol. 15, no 6, 2197-2256 p.
Keyword [en]
p-harmonic function, p-harmonic measure, Hausdorff dimension, Reifenberg flat domain, Wolff snowflake
National Category
Mathematics
Identifiers
URN: urn:nbn:se:uu:diva-163503DOI: 10.4171/JEMS/420ISI: 000326323400010OAI: oai:DiVA.org:uu-163503DiVA: diva2:464194
Available from: 2011-12-13 Created: 2011-12-12 Last updated: 2017-12-08Bibliographically approved

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Nyström, Kaj

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