TT-LSQR For Tensor Least Squares Problems and Application to Data Mining *

Lorenzo Piccinini, Valeria Simoncini

We are interested in the numerical solution of the tensor least squares problem \[ \min_{\mathcal{X}} \| \mathcal{F} - \sum_{i =1}^{\ell} \mathcal{X} \times_1 A_1^{(i)} \times_2 A_…