Search results for " Measure metric spaces"

showing 3 items of 3 documents

Higher integrability and stability of (p,q)-quasiminimizers

2023

Using purely variational methods, we prove local and global higher integrability results for upper gradients of quasiminimizers of a $(p,q)$-Dirichlet integral with fixed boundary data, assuming it belongs to a slightly better Newtonian space. We also obtain a stability property with respect to the varying exponents $p$ and $q$. The setting is a doubling metric measure space supporting a Poincar\'e inequality.

Mathematics - Analysis of PDEsApplied MathematicsFOS: Mathematics31E05 30L99 46E35AnalysisAnalysis of PDEs (math.AP)(pq)-Laplace operator Measure metric spaces Minimal p-weak upper gradient Minimizer
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Regularity properties for quasiminimizers of a $(p,q)$-Dirichlet integral

2021

Using a variational approach we study interior regularity for quasiminimizers of a $(p,q)$-Dirichlet integral, as well as regularity results up to the boundary, in the setting of a metric space equipped with a doubling measure and supporting a Poincar\'{e} inequality. For the interior regularity, we use De Giorgi type conditions to show that quasiminimizers are locally H\"{o}lder continuous and they satisfy Harnack inequality, the strong maximum principle, and Liouville's Theorem. Furthermore, we give a pointwise estimate near a boundary point, as well as a sufficient condition for H\"older continuity and a Wiener type regularity condition for continuity up to the boundary. Finally, we cons…

PointwiseApplied MathematicsMathematical analysisPoincaré inequalityBoundary (topology)Hölder conditionMetric Geometry (math.MG)Functional Analysis (math.FA)Dirichlet integralMathematics - Functional Analysissymbols.namesakeMetric spaceMaximum principleMathematics - Analysis of PDEsMathematics - Metric GeometrySettore MAT/05 - Analisi MatematicasymbolsFOS: Mathematics(p q)-Laplace operator Measure metric spaces Minimal p-weak upper gradient Minimizer31E05 30L99 46E35AnalysisHarnack's inequalityMathematicsAnalysis of PDEs (math.AP)
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Neumann p-Laplacian problems with a reaction term on metric spaces

2020

We use a variational approach to study existence and regularity of solutions for a Neumann p-Laplacian problem with a reaction term on metric spaces equipped with a doubling measure and supporting a Poincare inequality. Trace theorems for functions with bounded variation are applied in the definition of the variational functional and minimizers are shown to satisfy De Giorgi type conditions.

Pure mathematicsTrace (linear algebra)Applied MathematicsGeneral Mathematics010102 general mathematicsPoincaré inequalityType (model theory)p-Laplacian operator Measure metric spaces Minimalp-weak upper gradient Minimizer01 natural sciencesMeasure (mathematics)010305 fluids & plasmasTerm (time)symbols.namesakeMetric spaceSettore MAT/05 - Analisi Matematica0103 physical sciencesBounded variationsymbolsp-Laplacian0101 mathematicsMathematics
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