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arXiv 2302.01658math.NAcs.NA
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一种用于高维抛物型偏微分方程的时空自适应低秩方法

A space-time adaptive low-rank method for high-dimensional parabolic partial differential equations

Markus Bachmayr, Manfred Faldum

AI总结:

本研究提出一种结合时间稀疏小波展开与空间自适应低秩近似的高维抛物型偏微分方程自适应方法,证明其收敛性与复杂度优势,还可生成可计算的严格后验误差界,并通过数值实验验证结果。

摘要:

本文构建并分析了一种抛物型偏微分方程的自适应方法,该方法将时间方向的稀疏小波展开与空间变量的自适应低秩近似相结合。研究表明,该方法具有收敛性,且复杂度界与现有椭圆问题自适应低秩方法的复杂度界相近,证明其适用于高维空间域上的抛物型问题。该构建方法还能为此类问题生成可计算的严格后验误差界。研究结果通过数值实验得到验证。

英文摘要:

An adaptive method for parabolic partial differential equations that combines sparse wavelet expansions in time with adaptive low-rank approximations in the spatial variables is constructed and analyzed. The method is shown to converge and satisfy similar complexity bounds as existing adaptive low-rank methods for elliptic problems, establishing its suitability for parabolic problems on high-dimensional spatial domains. The construction also yields computable rigorous a posteriori error bounds for such problems. The results are illustrated by numerical experiments.

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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