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The Perron Method Associated with Finely p-harmonic Functions on Finely Open Sets
Linköping University, Department of Mathematics, Analysis and Mathematics Education. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0002-9677-8321
Linköping University, Department of Mathematics, Analysis and Mathematics Education. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0002-1238-6751
Univ Eastern Finland, Finland.
2025 (English)In: Potential Analysis, ISSN 0926-2601, E-ISSN 1572-929X, Vol. 63, no 2, p. 679-703Article in journal (Refereed) Published
Abstract [en]

Given a bounded finely open set V and a function f on the fine boundary of V, we introduce four types of upper Perron solutions to the nonlinear Dirichlet problem for p-energy minimizers, 1<p<infinity, with f as boundary data. These solutions are given as pointwise infima of suitable families of fine p-superminimizers in V. We show (under natural assumptions) that the four upper Perron solutions are equal quasieverywhere and that they are fine p-minimizers of the p-energy integral. We moreover show that the upper and the lower Perron solutions coincide quasieverywhere for Sobolev and for uniformly continuous boundary data, i.e. that such boundary data are resolutive. For the uniformly continuous boundary data, the Perron solutions are also shown to be finely continuous and thus finely p-harmonic. We prove our results in a complete metric space X equipped with a doubling measure supporting a p-Poincar & eacute; inequality, but they are new also in unweighted R-n.

Place, publisher, year, edition, pages
SPRINGER , 2025. Vol. 63, no 2, p. 679-703
Keywords [en]
Complete metric space; Dirichlet problem; Doubling measure; Fine p-minimizer; Finely continuous; Finely open set; Finely p-harmonic function; Nonlinear fine potential theory; Perron method; Poincare inequality; Resolutive
National Category
Mathematical Analysis
Identifiers
URN: urn:nbn:se:liu:diva-211294DOI: 10.1007/s11118-024-10185-xISI: 001405120000001Scopus ID: 2-s2.0-85217173245OAI: oai:DiVA.org:liu-211294DiVA, id: diva2:1934379
Note

Funding Agencies|Linkoeping University; Swedish Research Council [621- 2014-3974, 2016-03424, 2018-04106, 2020-04011]

Available from: 2025-02-04 Created: 2025-02-04 Last updated: 2025-10-28Bibliographically approved

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Björn, AndersBjörn, Jana

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