Convergence to Singular Triplets in the Two-Sided Block-Jacobi SVD Algorithm with Dynamic Ordering
Convergence to Singular Triplets in the Two-Sided Block-Jacobi SVD Algorithm with Dynamic Ordering
复制标题
具有动态排序的两侧块-Jacobi SVD 算法中奇异三元组的收敛性
DOI:
10.1137/21m1411895
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发表时间:
2022
影响因子:
1.5
通讯作者:
Vajtersic Marian
中科院分区:
文献类型:
--
作者:
Oksa Gabriel;Yamamoto Yusaku;Vajtersic Marian
We study the convergence of computed quantities to singular triplets in the serial and parallel block-Jacobi singular value decomposition (SVD) algorithm with dynamic ordering. After eliminating possible zero singular values by two finite decompositions of a matrix, which reduce the matrix dimensions to, it is shown that an iterated nonsingular matrixconverges to a fixed diagonal matrix and its diagonal elements are the singular values of an initial matrix. For the case of simple singular values, it is proved that the corresponding columns of the matrices of accumulated unitary transformations converge to corresponding left and right singular vectors. When a multiple singular value (or a cluster of singular values) is well separated from the other singular values, the convergence of two sequences of appropriate orthogonal projectors towards the orthogonal projectors onto the corresponding left and right subspaces is proved. Additionally, the convergence of orthogonal projectors leads to the convergence of certain computed subspaces towards the singular left and right subspaces spanned by left and right singular vectors corresponding to a multiple singular value or a cluster. An example computed in MATLAB illustrates the developed theory.
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DOI:
10.1016/j.parco.2009.12.013
发表时间:
2010
期刊:
Parallel Comput.
影响因子:
--
作者:
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通讯作者:
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Parallel Comput.
影响因子:
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影响因子:
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通讯作者:
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影响因子:
3.6
作者:
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通讯作者:
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影响因子:
1.5
作者:
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