Accelerating Convergence by Augmented Rayleigh-Ritz Projections For Large-Scale Eigenpair Computation
Accelerating Convergence by Augmented Rayleigh-Ritz Projections For Large-Scale Eigenpair Computation
复制标题
通过增强瑞利-里兹投影进行大规模特征对计算加速收敛
DOI:
10.1137/16m1058534
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发表时间:
2017-04
影响因子:
1.5
通讯作者:
Zhang Yin
中科院分区:
文献类型:
--
作者:
Wen Zaiwen;Zhang Yin
Iterative algorithms for large-scale eigenpair computation of symmetric matrices are mostly based on subspace projections consisting of two main steps: a subspace update (SU) step that generates bases for approximate eigenspaces, followed by a Rayleigh--Ritz projection step that extracts approximate eigenpairs. A predominant methodology for the SU step makes use of Krylov subspaces and builds orthonormal bases piece by piece in a sequential manner. On the other hand, block methods such as the classic (simultaneous) subspace iteration, allow higher levels of concurrency than what is reachable by Krylov subspace methods, but may suffer from slow convergence. In this work, we analyze the rate of convergence for a simple block algorithmic framework that combines an augmented Rayleigh--Ritz (ARR) procedure with the subspace iteration. Our main results are Theorem 4.5 and its corollaries, which show that the ARR procedure can provide significant accelerations to convergence speed. Our analysis will offer useful...
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DOI:
10.1137/s0895479899358595
发表时间:
2001-02
期刊:
SIAM J. Matrix Anal. Appl.
影响因子:
--
作者:
R. Lehoucq
通讯作者:
R. Lehoucq
影响因子:
2.1
作者:
H. Rutishauser
通讯作者:
H. Rutishauser
影响因子:
2.1
作者:
G. Stewart
通讯作者:
G. Stewart
影响因子:
6.3
作者:
A. Stathopoulos;C. Fischer
通讯作者:
A. Stathopoulos;C. Fischer
影响因子:
2.1
作者:
Li;Rencang;Zhang Lei-Hong
通讯作者:
Zhang Lei-Hong