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arXiv 2101.02495math.AP
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薛定谔方程的分形收敛性

Convergence over fractals for the Schrödinger equation

Renato Lucà, Felipe Ponce-Vanegas

摘要:

考虑了薛定谔方程的Carleson问题的分形精化,即确定解在关于$α$ -Hausdorff测度($α$ -a.e.)的几乎处处逐点收敛到其初始值所需的最小正则性.我们扩展到分形设置($α< n$)布尔增益\cite{Bourgain2016},这是尖锐的勒贝格措施设置($α= n$)最近的反例。在这样做时,我们恢复了必要条件从\cite{zbMATH07036806}逐点收敛~ $α$ -a.e.我们将其扩展到范围$n/2<α\leq (3n+1)/4$。

英文摘要:

We consider a fractal refinement of the Carleson problem for the Schrödinger equation, that is to identify the minimal regularity needed by the solutions to converge pointwise to their initial data almost everywhere with respect to the $α$-Hausdorff measure ($α$-a.e.). We extend to the fractal setting ($α< n$) a recent counterexample of Bourgain \cite{Bourgain2016}, which is sharp in the Lebesque measure setting ($α= n$). In doing so we recover the necessary condition from \cite{zbMATH07036806} for pointwise convergence~$α$-a.e. and we extend it to the range $n/2<α\leq (3n+1)/4$.

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