arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2009.03516math.NAcs.NAmath.AP
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一个次扩散势反问题:稳定性与重构

An Inverse Potential Problem for Subdiffusion: Stability and Reconstruction

Bangti Jin, Zhi Zhou

摘要:

在这项工作中,我们研究的反问题,恢复的潜在系数的亚扩散模型,其中涉及一个Djrbashian-Caputo导数的顺序$α\in(0,1)$的时间,从终端数据。我们证明了在初始数据满足一定条件的情况下,对于小的终端时间,逆问题是局部Lipschitz的。这一结果将Choulli和Yamamoto(1997)在标准抛物情形下的结果推广到分数情形。该分析依赖于双参数Mittag-Leffler函数的精细性质,例如,完全单调性和渐近性。此外,我们开发了一个有效的和易于实现的算法,数值恢复系数的基础上(预处理)不动点迭代和安德森加速。数值算例表明了该算法的有效性和准确性。

英文摘要:

In this work, we study the inverse problem of recovering a potential coefficient in the subdiffusion model, which involves a Djrbashian-Caputo derivative of order $α\in(0,1)$ in time, from the terminal data. We prove that the inverse problem is locally Lipschitz for small terminal time, under certain conditions on the initial data. This result extends the result in Choulli and Yamamoto (1997) for the standard parabolic case to the fractional case. The analysis relies on refined properties of two-parameter Mittag-Leffler functions, e.g., complete monotonicity and asymptotics. Further, we develop an efficient and easy-to-implement algorithm for numerically recovering the coefficient based on (preconditioned) fixed point iteration and Anderson acceleration. The efficiency and accuracy of the algorithm is illustrated with several numerical examples.

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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