Tensor Unfolding: A Fundamental Technique with Verified Implementation

Tensor mode unfolding is a fundamental technique where existing implementations often yield varying results. This code is developed based on formulas from the authoritative reference "Tensor Decompositions and Applications" and has been validated through multiple test cases, demonstrating full compliance with theoretical descriptions. The package includes two MATLAB files: one performs mode-n unfolding while the other implements the inverse transformation (mode-n folding). The implementation maintains mathematical rigor while providing clear operational functions for tensor manipulations.