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arXiv 2304.04431math.AP
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有界区域中时空分数阶方程的奇异解

Singular solutions for space-time fractional equations in a bounded domain

Hardy Chan, Juan Luis Vázquez, David Gómez-Castro

AI总结:

本文研究有界区域中含时间分数阶导数与自伴积分微分空间算子的线性扩散问题,利用谱理论构建经典解并引入弱对偶解,证明了初边值问题的适定性。

摘要:

本文致力于描述一个涉及时间分数阶导数和定义在有界区域上的自伴积分微分空间算子的线性扩散问题。我们关注的一个主要问题是处理空间分数阶扩散算子典型的奇异边界数据,另一个是在统一框架下考虑时间分数阶 Caputo 和 Riemann--Liouville 导数。我们首先利用谱理论并讨论相应的时间分数阶常微分方程,构建问题的经典解。我们利用这些时间分数阶导数之间的对偶性,为加权可积数据引入弱对偶解的概念。作为本文的主要结果,我们证明了在此意义下初值和边值问题的适定性。

英文摘要:

This paper is devoted to describing a linear diffusion problem involving fractional-in-time derivatives and self-adjoint integro-differential space operators posed in bounded domains. One main concern of our paper is to deal with singular boundary data which are typical of fractional diffusion operators in space, and the other one is the consideration of the fractional-in-time Caputo and Riemann--Liouville derivatives in a unified way. We first construct classical solutions of our problems using the spectral theory and discussing the corresponding fractional-in-time ordinary differential equations. We take advantage of the duality between these fractional-in-time derivatives to introduce the notion of weak-dual solution for weighted-integrable data. As the main result of the paper, we prove the well-posedness of the initial and boundary-value problems in this sense.

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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