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arXiv 2602.16348math.AP
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由混合局部-非局部算子驱动的热方程

Heat Equation driven by mixed local-nonlocal operators with non-regular space-dependent coefficients

Institute of Mathematics and Mathematical Modeling(数学与数学建模研究所);Ghent University(根特大学);Queen Mary University of London(伦敦玛丽女王大学)

Arshyn Altybay, Michael Ruzhansky

AI总结:

本文研究了由混合局部-非局部扩散算子驱动的热方程,建立了有界系数下的经典适定性,并扩展了解的概念以适应分布系数,证明了解网的存在性和唯一性。

摘要:

本文研究了一个由混合局部-非局部扩散算子驱动的热方程的柯西问题。我们首先在能量框架下建立了有界、可测系数的经典适定性,这些系数满足均匀正性,并推导了一个先验估计,确保唯一性和初始数据的连续依赖性。然后,我们通过弗里德里希斯型正则化程序将解的概念扩展到分布系数和初始数据。在这一非常弱的框架下,我们建立了解的网的存在性和唯一性,并证明了当系数正则时,与经典弱解一致。

英文摘要:

In this paper, we study the Cauchy problem for a heat equation governed by a mixed local--nonlocal diffusion operator with spatially dependent coefficients. For bounded measurable coefficients satisfying uniform positivity conditions and initial data in $H^1(\mathbb R^d)$, we first establish existence and uniqueness of weak solutions in the natural energy space and derive an a priori energy estimate. We then extend the analysis to strictly positive distributional coefficients and compactly supported distributional initial data by means of a Friedrichs-type regularisation procedure. Under suitable moderateness assumptions on the regularising nets, we establish the existence of very weak solutions and prove uniqueness modulo negligible perturbations of admissible regularisations. Finally, under appropriate convergence assumptions on the regularised coefficients and initial data, together with preservation of uniform positivity, we prove consistency of the very weak solution with the corresponding weak solution.

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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