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The variable exponent BV-Sobolev capacity

By Heikki Hakkarainen and Matti Nuortio

Abstract

In this article we study basic properties of the mixed BV-Sobolev capacity with variable exponent p. We give an alternative way to define mixed type BV-Sobolev-space which was originally introduced by Harjulehto, H\"ast\"o, and Latvala. Our definition is based on relaxing the p-energy functional with respect to the Lebesgue space topology. We prove that this procedure produces a Banach space that coincides with the space defined by Harjulehto et al. for bounded domain and log-H\"older continuous exponent p. Then we show that this induces a type of variable exponent BV-capacity and that this is a Choquet capacity with many usual properties. Finally, we prove that this capacity has the same null sets as the variable exponent Sobolev capacity when p is log-H\"older continuous.Comment: 33 page

Topics: Mathematics - Classical Analysis and ODEs, 46E35, 26A45, 28A12
Year: 2011
OAI identifier: oai:arXiv.org:1104.0792
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