Automatic coarsening in Algebraic Multigrid utilizing quality measures for matching-based aggregations
Automatic coarsening in Algebraic Multigrid utilizing quality measures for matching-based aggregations
复制标题
利用质量测量进行基于匹配的聚合的代数多重网格中的自动粗化
DOI:
10.1016/j.camwa.2023.06.026
复制
发表时间:
2023
影响因子:
2.9
通讯作者:
Zikatanov, Ludmil
中科院分区:
文献类型:
--
作者:
D'Ambra, Pasqua;Durastante, Fabio;Filippone, Salvatore;Zikatanov, Ludmil
In this paper, we discuss the convergence of an Algebraic MultiGrid (AMG) method for general symmetric positive-definite matrices. The method relies on an aggregation algorithm, namedcoarsening based on compatible weighted matching, which exploits the interplay between the principle of compatible relaxation and the maximum product matching in undirected weighted graphs. The results are based on a general convergence analysis theory applied to the class of AMG methods employing unsmoothed aggregation and identifying a quality measure for the coarsening; similar quality measures were originally introduced and applied to other methods as tools to obtain good quality aggregates leading to optimal convergence for M-matrices. The analysis, as well as the coarsening procedure, is purely algebraic and, in our case, allows anaposteriorievaluation of the quality of the aggregation procedure which we apply to analyze the impact of approximate algorithms for matching computation and the definition of graph edge weights. We also explore the connection between the choice of the aggregates and the compatible relaxation convergence, confirming the consistency between theories for designing coarsening procedures in purely algebraic multigrid methods and the effectiveness of the coarsening based on compatible weighted matching. We discuss various completely automatic algorithmic approaches to obtain aggregates for which good convergence properties are achieved on various test cases.
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DOI:
--
发表时间:
1986
期刊:
影响因子:
--
作者:
R. Blaheta
通讯作者:
R. Blaheta
DOI:
--
发表时间:
1991
期刊:
影响因子:
--
作者:
I. Marek
通讯作者:
I. Marek
影响因子:
--
作者:
P. D'Ambra;P. Vassilevski
通讯作者:
P. D'Ambra;P. Vassilevski
DOI:
10.1137/18m1194493
发表时间:
2018-06
期刊:
SIAM J. Sci. Comput.
影响因子:
--
作者:
Xiaozhe Hu;Junyuan Lin;L. Zikatanov
通讯作者:
Xiaozhe Hu;Junyuan Lin;L. Zikatanov
影响因子:
2.4
作者:
Xu, Wenfang;Zikatanov, Ludmil T.
通讯作者:
Zikatanov, Ludmil T.