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arXiv 1209.6477math.CAmath.FA
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标度不变Besov空间上的有界复合

Bounded compositions on scaling invariant Besov spaces

Herbert Koch, Pekka Koskela, Eero Saksman, Tomás Soto

摘要:

对于$0 < s < 1 < q < \infty$,我们刻画了同胚$φ: \real^n \to \real^n$的组合算子$f \mapsto f \circ φ$是有界的齐次,标度不变的Besov空间$\dot{B}^s_{n/s,q}(\real^n)$,其中的重点是在$q\not=n/s$的情况下,在以前的文献中,左开放。我们还在一类度量测度空间上建立了Besov型函数空间的类似结果,并对具有$0 < s < 1$和$0 < q \leq \infty$的标度不变的Triebel-Lizorkin空间$\dot{F}^s_{n/s,q}(\real^n)$作了一些新的评论.

英文摘要:

For $0 < s < 1 < q < \infty$, we characterize the homeomorphisms $φ: \real^n \to \real^n$ for which the composition operator $f \mapsto f \circ φ$ is bounded on the homogeneous, scaling invariant Besov space $\dot{B}^s_{n/s,q}(\real^n)$, where the emphasis is on the case $q\not=n/s$, left open in the previous literature. We also establish an analogous result for Besov-type function spaces on a wide class of metric measure spaces as well, and make some new remarks considering the scaling invariant Triebel-Lizorkin spaces $\dot{F}^s_{n/s,q}(\real^n)$ with $0 < s < 1$ and $0 < q \leq \infty$.

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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