I currently need to do a HOSVD, see the reference.
It's something which look very common nowaday and I was wondering if there was a implemented function in Mathematica to do this HOSVD.
Lieven De Lathauwer, Bart De Moor and Joos Vandewalle (April 2000). "A multilinear Singular Value Decomposition". SIAM 21 (4).