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arXiv 1708.06294math.AP
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分数阶Calderón问题:低正则性和稳定性

The fractional Calderón problem: low regularity and stability

Angkana Rüland, Mikko Salo

摘要:

分数阶薛定谔方程的Calderón问题在\cite{GSU}的工作中被引入,在部分数据的情况下也给出了整体唯一性结果。本文从两个方面改进了这个结果。首先,我们证明了一个定量的唯一性结果,表明该反问题在适当的先验界下具有对数稳定性。其次,我们证明了这些结果对标度不变的$L^p$或负序索伯列夫空间中的势是有效的。一个关键点是分数阶方程的解的定量逼近性质,通过结合仔细传播的小分析的Caffarelli-Silvestre扩展和对偶参数。

英文摘要:

The Calderón problem for the fractional Schrödinger equation was introduced in the work \cite{GSU}, which gave a global uniqueness result also in the partial data case. This article improves this result in two ways. First, we prove a quantitative uniqueness result showing that this inverse problem enjoys logarithmic stability under suitable a priori bounds. Second, we show that the results are valid for potentials in scale-invariant $L^p$ or negative order Sobolev spaces. A key point is a quantitative approximation property for solutions of fractional equations, obtained by combining a careful propagation of smallness analysis for the Caffarelli-Silvestre extension and a duality argument.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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