FastTT converts large sparse tensors to tensor-train format with the same accuracy and TT ranks as TT-SVD but with large speedups, by constructing an exact low-rank representation from nonzero fibers and applying specialized rounding.
Tensor-train decomposition
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Faster Tensor Train Decomposition for Sparse Data
FastTT converts large sparse tensors to tensor-train format with the same accuracy and TT ranks as TT-SVD but with large speedups, by constructing an exact low-rank representation from nonzero fibers and applying specialized rounding.