Есть ли у кого доступ к Wiley? Помогите скачать статьи F.L.Hitchcock "The Expression of a Tensor or a Polyadic as a Sum of Products", J. Math. and Phys. 6(1), 164-189, 1927 и "Multiple Invariants and Generalized Rank of a

-Way Matrix or Tensor", J. Math. and Phys. 7(1), 39-79, 1928.
http://onlinelibrary.wiley.com/doi/10.1 ... 4/abstracthttp://onlinelibrary.wiley.com/doi/10.1 ... 9/abstract