高维抛物偏微分方程的时空自适应低阶方法

IF 1.8 2区数学 Q1 MATHEMATICS

Journal of Complexity Pub Date : 2024-02-09 DOI:10.1016/j.jco.2024.101839

Markus Bachmayr, Manfred Faldum

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引用次数: 0

摘要

本文构建并分析了抛物线偏微分方程的自适应方法，该方法结合了时间上的稀疏小波展开和空间变量上的自适应低阶近似。结果表明，该方法收敛并满足与现有椭圆问题自适应低阶方法相似的复杂度边界，从而确定了它适用于高维空间域上的抛物问题。该构造还为此类问题提供了可计算的严格后验误差边界。数值实验对结果进行了说明。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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

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.

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来源期刊

Journal of Complexity 工程技术-计算机：理论方法

CiteScore

3.10

自引率

17.60%

发文量

审稿时长

>12 weeks

期刊介绍： The multidisciplinary Journal of Complexity publishes original research papers that contain substantial mathematical results on complexity as broadly conceived. Outstanding review papers will also be published. In the area of computational complexity, the focus is on complexity over the reals, with the emphasis on lower bounds and optimal algorithms. The Journal of Complexity also publishes articles that provide major new algorithms or make important progress on upper bounds. Other models of computation, such as the Turing machine model, are also of interest. Computational complexity results in a wide variety of areas are solicited. Areas Include: • Approximation theory • Biomedical computing • Compressed computing and sensing • Computational finance • Computational number theory • Computational stochastics • Control theory • Cryptography • Design of experiments • Differential equations • Discrete problems • Distributed and parallel computation • High and infinite-dimensional problems • Information-based complexity • Inverse and ill-posed problems • Machine learning • Markov chain Monte Carlo • Monte Carlo and quasi-Monte Carlo • Multivariate integration and approximation • Noisy data • Nonlinear and algebraic equations • Numerical analysis • Operator equations • Optimization • Quantum computing • Scientific computation • Tractability of multivariate problems • Vision and image understanding.