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arXiv 1709.00976math.AP
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拉普拉斯算子的正幂:从超奇异积分到边值问题

Positive powers of the Laplacian: from hypersingular integrals to boundary value problems

Nicola Abatangelo, Sven Jarohs, Alberto Saldaña

摘要:

拉普拉斯算子的任何正幂都通过其傅里叶符号与具有有限差分的超奇异积分相关。我们将展示如何产生一个逐点的评价,这是更灵活的比其他概念,迄今为止在文献中使用的权力大于1,特别是,这种评价可以应用到更一般的边值问题,我们展示了明确的例子。我们还提供了一个自然的变分框架,并使用渐近分析,我们证明了这些超奇异积分减少到多调和算子在某些情况下。我们的介绍旨在尽可能独立,并依赖于基本逐点计算和特殊函数的已知身份。

英文摘要:

Any positive power of the Laplacian is related via its Fourier symbol to a hypersingular integral with finite differences. We show how this yields a pointwise evaluation which is more flexible than other notions used so far in the literature for powers larger than 1; in particular, this evaluation can be applied to more general boundary value problems and we exhibit explicit examples. We also provide a natural variational framework and, using an asymptotic analysis, we prove how these hypersingular integrals reduce to polyharmonic operators in some cases. Our presentation aims to be as self-contained as possible and relies on elementary pointwise calculations and known identities for special functions.

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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