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arXiv 1607.05933math.FA
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关于泛可微集的结构

On the structure of universal differentiability sets

Michael Dymond

摘要:

证明了欧几里得空间中的泛可微集具有独特的结构性质。也就是说,我们表明,任何普遍的可微集包含一个“内核”,其中每个Lipschitz函数的可微点是密集的。我们进一步证明,没有泛可微集可以分解为相对封闭的,非泛可微集的可数并。这个结果的锐度,相对于现有的分解结果的相反性质,进行了讨论。

英文摘要:

We prove that universal differentiability sets in Euclidean spaces possess distinctive structural properties. Namely, we show that any universal differentiability set contains a `kernel' in which the points of differentiability of each Lipschitz function are dense. We further prove that no universal differentiability set may be decomposed as a countable union of relatively closed, non-universal differentiability sets. The sharpness of this result, with respect to existing decomposibility results of the opposite nature, is discussed.

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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