3tens23May11.pdf (185.62 kB)
Download fileOn the generic and typical ranks of 3-tensors
journal contribution
posted on 2012-03-02, 00:00 authored by S. FriedlandWe study the generic and typical ranks of 3-tensors of dimension l, m, n using results from matrices and algebraic geometry. We state a conjecture about the exact values of the generic rank of 3-tensors over the complex numbers, which is veried numerically for l; m; ≤ n 14. We also discuss the typical ranks over the real numbers, and give an example of an innite family of 3-tensors of the form l = m; n = (m-1)2 + 1;m = 3; 4,..., which have at least two typical ranks.