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arXiv 1502.01379math.NAcs.NA
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蝶形分解

Butterfly Factorization

Department of Mathematics, Stanford University(斯坦福大学数学系);ICME, Stanford University(斯坦福大学计算数学工程研究所)

Yingzhou Li, Haizhao Yang, Eileen Martin, Kenneth Ho, Lexing Ying

AI总结:

本文提出蝶形分解作为满足互补低秩性质矩阵的数据稀疏近似方法,通过高效算法或独立采样实现快速构造,适用于大规模矩阵的快速运算。

摘要:

本文介绍蝶形分解作为一种数据稀疏近似方法,用于满足互补低秩性质的矩阵。如果能够快速应用矩阵及其共轭转置或能单独采样矩阵元素,则可以高效构造该分解。对于一个$N \times N$矩阵,所得到的分解是$O(\log N)$个稀疏矩阵的乘积,每个矩阵有$O(N)$个非零元素。因此,该分解可以在$O(N\log N)$操作内快速应用。提供了数值结果以展示蝶形分解及其构造算法的有效性。

英文摘要:

The paper introduces the butterfly factorization as a data-sparse approximation for the matrices that satisfy a complementary low-rank property. The factorization can be constructed efficiently if either fast algorithms for applying the matrix and its adjoint are available or the entries of the matrix can be sampled individually. For an $N \times N$ matrix, the resulting factorization is a product of $O(\log N)$ sparse matrices, each with $O(N)$ non-zero entries. Hence, it can be applied rapidly in $O(N\log N)$ operations. Numerical results are provided to demonstrate the effectiveness of the butterfly factorization and its construction algorithms.

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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