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arXiv 2408.03299math.AP
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分数阶到局部Dirichlet问题的收敛速率

Convergence rates of the fractional to the local Dirichlet problem

University of Würzburg(维尔茨堡大学);Universidad Autónoma de Madrid(马德里自治大学)

Leon Bungert, Félix del Teso

AI总结:

本文通过变分论证,证明了当s↑1时,分数阶Dirichlet问题的解在W^{s,2}(ℝ^d)范数下以√(1-s)或√((1-s)|log(1-s)|)的速率收敛到局部Dirichlet问题的解。

摘要:

我们证明了当$s\uparrow 1$时,分数阶Dirichlet问题的解在$W^{s,2}(\mathbb R^d)$-范数下收敛到局部Dirichlet问题的解的非渐近速率。对于足够正则的边界值,我们得到阶为$\sqrt{1-s}$的速率,而对于较不正则的数据,速率为阶$\sqrt{(1-s)|\log(1-s)|}$。当右端项依赖于$s$时,我们也得到了结果,并且我们的误差估计对所有$s\in(0,1)$成立。证明使用变分论证,从分数阶和标准Dirichlet能量之间的能量估计推导出分数阶Sobolev范数中的速率。

英文摘要:

We prove non-asymptotic rates of convergence in the $W^{s,2}(\mathbb R^d)$-norm for the solution of the fractional Dirichlet problem to the solution of the local Dirichlet problem as $s\uparrow 1$. For regular enough boundary values we get a rate of order $\sqrt{1-s}$, while for less regular data the rate is of order $\sqrt{(1-s)|\log(1-s)|}$. We also obtain results when the right hand side depends on $s$, and our error estimates are true for all $s\in(0,1)$. The proofs use variational arguments to deduce rates in the fractional Sobolev norm from energy estimates between the fractional and the standard Dirichlet energy.

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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