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arXiv 1402.1673math.NAcs.NAstat.OT
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非正交张量对角化

Non-Orthogonal Tensor Diagonalization

Institute of Information Theory and Automation(信息与自动化研究所);Brain Science Institute, RIKEN(理化学研究所脑科学研究所);Systems Research Institute, Polish Academy of Sciences(波兰科学院系统研究所)

Petr Tichavsky, Anh Huy Phan, Andrzej Cichocki

AI总结:

本文提出非正交张量对角化算法,用于处理对称和非对称张量的对角化问题,并改进了张量分解方法。

摘要:

张量对角化是指通过乘以非正交可逆矩阵沿张量选定的维度将给定的张量转换为精确或近似的对角形式。它是近似联合对角化(AJD)的推广。特别是,我们推导出(1)一种新的对称AJD算法,称为三阶张量的双侧对称对角化,(2)一种类似的非对称AJD算法,也称为三阶张量的通用双侧对角化,以及(3)一种用于三阶张量三侧对角化的算法。后两种算法可用于canonial polyadic(CP)张量分解,并且在张量秩不超过张量多线性秩的限制下,可以比其他CP张量分解方法在计算速度上更优。最后,我们提出(4)类似的张量块对角化算法,这与张量块项分解有关。

英文摘要:

Tensor diagonalization means transforming a given tensor to an exactly or nearly diagonal form through multiplying the tensor by non-orthogonal invertible matrices along selected dimensions of the tensor. It is generalization of approximate joint diagonalization (AJD) of a set of matrices. In particular, we derive (1) a new algorithm for symmetric AJD, which is called two-sided symmetric diagonalization of order-three tensor, (2) a similar algorithm for non-symmetric AJD, also called general two-sided diagonalization of an order-3 tensor, and (3) an algorithm for three-sided diagonalization of order-3 or order-4 tensors. The latter two algorithms may serve for canonical polyadic (CP) tensor decomposition, and they can outperform other CP tensor decomposition methods in terms of computational speed under the restriction that the tensor rank does not exceed the tensor multilinear rank. Finally, we propose (4) similar algorithms for tensor block diagonalization, which is related to the tensor block-term decomposition.

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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