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arXiv 2103.09868math.NAcs.NA
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一类七对角(近)Toeplitz矩阵的逆性质

Inverse properties of a class of seven-diagonal (near) Toeplitz matrices

Bakytzhan Kurmanbek, Yogi Erlangga, Yerlan Amanbek

摘要:

本文讨论了用有限差分法数值解非线性四阶微分方程时出现的一类七对角(近)Toeplitz矩阵的显式逆.利用Sherman-Morrison公式推导了一个非递推的显式反演公式。与求解微分方程的不动点迭代法有关,我们证明了逆矩阵的正性,并构造了逆矩阵范数的上界,它可以用来预测方法的收敛性.

英文摘要:

This paper discusses the explicit inverse of a class of seven-diagonal (near) Toeplitz matrices, which arises in the numerical solutions of nonlinear fourth-order differential equation with a finite difference method. A non-recurrence explicit inverse formula is derived using the Sherman-Morrison formula. Related to the fixed-point iteration used to solve the differential equation, we show the positivity of the inverse matrix and construct an upper bound for the norms of the inverse matrix, which can be used to predict the convergence of the method.

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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