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• W2283056424 abstract "We derive a CUR-type factorization for tensors in the Tucker format based on interpolatory decomposition, which we will denote as Higher Order Interpolatory Decomposition (HOID). Given a tensor $mathcal{X}$, the algorithm provides a set of column vectors ${ mathbf{C}_n}_{n=1}^d$ which are columns extracted from the mode-$n$ tensor unfolding, along with a core tensor $mathcal{G}$ and together, they satisfy some error bounds. Compared to the Higher Order SVD (HOSVD) algorithm, the HOID provides a decomposition that preserves certain important features of the original tensor such as sparsity, non-negativity, integer values, etc. Error bounds along with detailed estimates of computational costs are provided. The algorithms proposed in this paper have been validated against carefully chosen numerical examples which highlight the favorable properties of the algorithms. Related methods for subset selection proposed for matrix CUR decomposition, such as Discrete Empirical Interpolation method (DEIM) and leverage score sampling, have also been extended to tensors and are compared against our proposed algorithms." @default.
• W2283056424 created "2016-06-24" @default.
• W2283056424 creator A5045561492 @default.
• W2283056424 date "2015-11-16" @default.
• W2283056424 modified "2023-09-27" @default.
• W2283056424 title "HOID: Higher Order Interpolatory Decomposition for tensors based on Tucker representation" @default.
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