Transference of Fractional Laplacian Regularity

Transference of Fractional Laplacian Regularity
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分数拉普拉斯正则性的传递

DOI:
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发表时间:
2014
期刊:
影响因子:
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通讯作者:
P. R. Stinga
P. R. Stinga
中科院分区:
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文献类型:
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作者:
L. Roncal;P. R. Stinga

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在这篇笔记中,我们展示了如何从(mathbb{R}^{n})上的分数拉普拉斯算子获得多维环面(mathbb{T}^{n})上的分数拉普拉斯算子的正则性估计。虽然乍一看,这似乎很自然,但必须仔细推敲。一个原因是一个简单的事实,即环面上的L 2函数不能与(mathbb{R}^{n})上的L 2函数相同。转移是通过一个在分配意义上成立的公式来实现的。这样的身份,使我们能够转移Harnack不等式,涉及的扩张问题,并获得逐点公式和保持器正则性估计。
In this note we show how to obtain regularity estimates for the fractional Laplacian on the multidimensional torus (mathbb{T}^{n}) from the fractional Laplacian on (mathbb{R}^{n}). Though at first glance this may seem quite natural, it must be carefully precised. A reason for that is the simple fact that L 2 functions on the torus cannot be identified with L 2 functions on (mathbb{R}^{n}). The transference is achieved through a formula that holds in the distributional sense. Such an identity allows us to transfer Harnack inequalities, to relate the extension problems, and to obtain pointwise formulas and Holder regularity estimates.