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arXiv 2201.02033math.NAcs.NA
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带体积约束的弱奇异非局部扩散方程Jacobi谱配置法的收敛性分析

Convergence analysis of Jacobi spectral collocation methods for weakly singular nonlocal diffusion equations with volume constraints

Jiashu Lu, Mengna Yang, Yufeng Nie

摘要:

本文研究了带Dirichlet型体积约束的弱奇异非局部扩散方程的有效谱解.我们考虑的方程包含一个积分算子,该算子在整环的中点处具有奇异性,而积分算子的逼近是求解非局部方程的一个基本困难.为了克服这一问题,提出了双边Jacobi谱求积规则,发展了求解非局部扩散方程的Jacobi谱配置法.在$L^\infty$范数下,对所提方法进行了严格的收敛性分析,并进一步证明了当非局部相互作用消失时,Jacobi配置解收敛到其相应的局部极限.最后还给出数值例子验证理论结果.

英文摘要:

This paper considers efficient spectral solutions for weakly singular nonlocal diffusion equations with Dirichlet-type volume constraints. The equation we consider contains an integral operator that typically has a singularity at the midpoint of the integral domain, and the approximation of the integral operator is one of the essential difficulties in solving nonlocal equations. To overcome this problem, two-sided Jacobi spectral quadrature rules are proposed to develop a Jacobi spectral collocation method for nonlocal diffusion equations. A rigorous convergence analysis of the proposed method with the $L^\infty$ norm is presented, and we further prove that the Jacobi collocation solution converges to its corresponding local limit as nonlocal interactions vanish. Numerical examples are given to verify the theoretical results.

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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