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Towards an L^p Potential Theory for Sub-Markovian Semigroups:Kernels and Capacities

Towards an L^p Potential Theory for Sub-Markovian Semigroups:Kernels and Capacities
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摘要 We study in fairly general measure spaces (X,μ) the (non-linear) potential theory of L^p sub-Markovian semigroups which are given by kernels having a density with respect to the underlying measure. In terms of mapping properties of the operators we provide sufficient conditions for the existence (and regularity) of such densities. We give various (dual) representations for several associated capacities and, in the corresponding abstract Bessel potential spaces, we study the role of the truncation property. Examples are discussed in the case of R^n where abstract Bessel potential spaces can be identified with concrete function spaces. We study in fairly general measure spaces (X,μ) the (non-linear) potential theory of L^p sub-Markovian semigroups which are given by kernels having a density with respect to the underlying measure. In terms of mapping properties of the operators we provide sufficient conditions for the existence (and regularity) of such densities. We give various (dual) representations for several associated capacities and, in the corresponding abstract Bessel potential spaces, we study the role of the truncation property. Examples are discussed in the case of R^n where abstract Bessel potential spaces can be identified with concrete function spaces.
出处 《Acta Mathematica Sinica,English Series》 SCIE CSCD 2006年第4期1227-1250,共24页 数学学报(英文版)
关键词 nonlinear potential theory (r p)-capacity Bessel potential space gamma.transform sub-Markovian semigroup nonlinear potential theory, (r,p)-capacity, Bessel potential space, gamma.transform, sub-Markovian semigroup
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