Inspec keywords: least squares approximations; gradient methods; matrix algebra; tensors; pattern clustering; image representation; approximation theory

Other keywords: low-rank regulariser; decomposition model; subspace clustering; LRATD; tensorial data; data noise; low-dimensional intrinsic core tensor representation; original tensor; low-rank approximation-based tensor decomposition algorithm; projection matrices; underlying intrinsic structure

Subjects: Other topics in statistics; Interpolation and function approximation (numerical analysis); Computer vision and image processing techniques; Data handling techniques; Algebra; Knowledge engineering techniques; Algebra