Cauchy independent measures and almost-additivity of analytic capacity
Cauchy independent measures and almost-additivity of analytic capacity
复制标题
柯西独立测度和分析能力的近加性
DOI:
10.1007/s11854-018-0055-6
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发表时间:
2018
期刊:
影响因子:
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通讯作者:
Volberg, Alexander
中科院分区:
文献类型:
--
作者:
Eiderman, Vladimir;Reznikov, Alexander;Volberg, Alexander
We show that, given a family of discs centered at a chord-arc curve, the analytic capacity of a union of subsets of these discs (one subset in each disc) is comparable with the sum of their analytic capacities. However, we need the discs in question to be separated, and it is not clear whether the separation condition is essential. We apply this result to find families {μj} of measures in ℂ with the following property. If the Cauchy integral operatorsfromL2(μj) to itself are bounded uniformly inj, thenCμ,μ= Σμj, is also bounded fromL2(μ) to itself.
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