2 problems

Let $\text{\sc Beta}$ denote the convex relaxation of the ball-constrained nonconvex quadratic program defined in the paper, with matrix variable $W$ and vectors $\ell_1,\ell_2$ as…

Let a third-order tensor have a t-SVD with f-diagonal tensor $\boldsymbol{\mathscr{S}}$, and define its tensor-tubal-rank as the number of nonzero diagonal tubes…