IN: a series of th order tensors, , .  OUT: Matrices (, ) with orthogonal column vectors.  (1) Initial values: and whose columns are determined as the first  leading eigenvectors of the matrices .  (2) Iterate for until convergence  (i) Maximize ,  Solution: whose columns are determined as the first leading  eigenvectors of  Set .  (ii) Maximize ,  Solution: whose columns are determined as the first leading  eigenvectors of  Set .   (iii) Maximize ,   Solution: whose columns are determined as the first leading  eigenvectors of  Set .   (iv) Maximize ,  Solution: whose columns are determined as the first leading  eigenvectors of  Set .   (3) Set , . 
