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arXiv 2102.04644math.NAcs.NA
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多步向后差分公式的一种新的离散能量技术

A new discrete energy technique for multi-step backward difference formulas

Honglin Liao, Tao Tang, Tao Zhou

摘要:

向后微分公式(BDF)是一类用于刚性微分方程数值积分的隐式方法。值得注意的是,抛物型方程的$A$稳定的BDF 1和BDF 2格式的稳定性和收敛性可以直接用标准的离散能量分析来证明。然而,这种经典的分析方法似乎不能直接应用于$3\leq \mathbf{k}\leq 5$的$\mathbf{k}$格式.为了克服这个困难,一个强大的分析工具的基础上Nevanlinna-Odeh乘数技术[Numer.功能Anal. Optim.,3:377-423,1981]由Lubich等人[IMA J. Numer.肛门,33:1365-1385,2013]。在这项工作中,通过使用所谓的离散正交卷积核技术,我们将恢复经典的能量分析,使$3\leq \mathbf{k}\leq 5$的$\mathbf{k}$格式的稳定性和收敛性可以建立。我们的分析技术的理论优势之一是对初始数据的空间规则性要求较少。

英文摘要:

The backward differentiation formula (BDF) is a useful family of implicit methods for the numerical integration of stiff differential equations. It is well noticed that the stability and convergence of the $A$-stable BDF1 and BDF2 schemes for parabolic equations can be directly established by using the standard discrete energy analysis. However, such classical analysis technique seems not directly applicable to the BDF-$\mathbf{k}$ schemes for $3\leq \mathbf{k}\leq 5$. To overcome the difficulty, a powerful analysis tool based on the Nevanlinna-Odeh multiplier technique [Numer. Funct. Anal. Optim., 3:377-423, 1981] was developed by Lubich et al. [IMA J. Numer. Anal., 33:1365-1385, 2013]. In this work, by using the so-called discrete orthogonal convolution kernels technique, we will recover the classical energy analysis so that the stability and convergence of the BDF-$\mathbf{k}$ schemes for $3\leq \mathbf{k}\leq 5$ can be established. One of the theoretical advantages of our analysis technique is that less spacial regularity requirement is needed on the initial data.

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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