criteria would be helpful Computationally expensive The number of elements of the Hankel tensor dramatically increases w.r.t. Ex: we consider MDT of (128,128,128)-tensor small large DE 128 128 128 τ Size of Hankel tensor Memory requirement 8 (8, 121, 8, 121, 8, 121) 約7GB 16 (16, 113, 16, 113, 16, 113) 約47GB 32 (32, 97, 32, 97, 32, 97) 約239GB 64 (64, 65, 64, 65, 64, 65) 約575GB