Mixed Precision Iterative Refinement Methods for Linear Systems: Convergence Analysis Based on Krylov Subspace Methods
Mixed Precision Iterative Refinement Methods for Linear Systems: Convergence Analysis Based on Krylov Subspace Methods
复制标题
线性系统混合精度迭代细化方法:基于Krylov子空间方法的收敛性分析
DOI:
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发表时间:
2010
期刊:
影响因子:
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通讯作者:
B. Rocker
中科院分区:
文献类型:
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作者:
H. Anzt;V. Heuveline;B. Rocker
The convergence analysis of Krylov subspace solvers usually provides an estimation for the computational cost. Exact knowledge about the convergence theory of error correction methods using different floating point precision formats would enable to determine a priori whether the implementation of a mixed precision iterative refinement solver using a certain Krylov subspace method as error correction solver outperforms the plain solver in high precision. This paper reveals characteristics of mixed precision iterative refinement methods using Krylov subspace methods as inner solver.