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arXiv 2402.16487math.AP
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非局部梯度:微积分基本定理、Poincaré不等式与嵌入

Nonlocal gradients: Fundamental theorem of calculus, Poincaré inequalities and embeddings

José Carlos Bellido, Carlos Mora-Corral, Hidde Schönberger

AI总结:

本文研究由一般径向核定义的非局部梯度,在极弱假设下建立Poincaré不等式与紧嵌入,并通过卷积型微积分基本定理证明Orlicz空间及连续函数空间嵌入,同时给出不同核对应空间的包含与相等条件。

摘要:

我们研究通过一般径向核 $ρ$ 定义的非局部梯度。我们的研究聚焦于相关函数空间的性质,这些性质依赖于核函数的特征。具体而言,即使在对 $ρ$ 施加极少的假设条件下,我们也建立了 Poincaré 不等式以及到 Lebesgue 空间的紧嵌入。此外,我们提出了一个微积分基本定理,使我们能够通过卷积从其非局部梯度中恢复函数。这一结果被用于证明到 Orlicz 空间和连续函数空间的嵌入,这些嵌入对应于经典梯度情形下著名的 Sobolev 和 Morrey 不等式。最后,我们建立了与不同核相关联的空间之间的包含关系和相等性的条件。

英文摘要:

We address the study of nonlocal gradients defined through general radial kernels $ρ$. Our investigation focuses on the properties of the associated function spaces, which depend on the characteristics of the kernel function. Specifically, even with minimal assumptions on $ρ$, we establish Poincaré inequalities and compact embeddings into Lebesgue spaces. Additionally, we present a fundamental theorem of calculus that enables us to recover a function from its nonlocal gradient through a convolution. This is used to demonstrate embeddings into Orlicz spaces and spaces of continuous functions that mirror the well-known Sobolev and Morrey inequalities for classical gradients. Finally, we establish conditions for inclusions and equality of spaces associated to different kernels.

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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