Abstract
AbstractWe consider applications of the dual pair of the (upper) Assouad dimension and the lower (Assouad) dimension in analysis. We relate these notions to other dimensional conditions such as a Hausdorff content density condition and an integrability condition for the distance function. The latter condition leads to a characterization of the Muckenhoupt A p properties of distance functions in terms of the (upper) Assouad dimension. It is also possible to give natural formulations for the validity of Hardy–Sobolev inequalities using these dual Assouad dimensions, and this helps to understand the previously observed dual nature of certain cases of these inequalities.KeywordsAssouad dimensionLower dimensionAikawa conditionMuckenhoupt weightHardy–Sobolev inequalityMathematics Subject Classifications (2010)Primary: 28A75; Secondary: 28A8035A23
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