]. S. Ab and . Abrescia, About the Defectivity of Certain SegreVeronese Varieties, Canadian Journal of Mathematics, vol.60, issue.5, 2008.

M. [. Abo and . Brambilla, Secant varieties of Segre-Veronese varieties P m ×P n embedded by, Experimental Mathematics, pp.369-384, 2009.

L. Albera, P. Chevalier, P. Comon, and A. , On the virtual array concept for higher order array processing, IEEE Trans. Sig. Proc, vol.53, issue.4, pp.1254-1271, 2005.

. J. Ah, A. Alexander, and . Hirschowitz, Polynomial interpolation in several variables, J. Alg. Geom, vol.4, pp.201-222, 1995.

A. [. Alexander and . Hirschowitz, An asymptotic vanishing theorem for generic unions of multiple points, Inventiones Mathematicae, vol.140, issue.2, pp.303-325, 2000.
DOI : 10.1007/s002220000053

. Bcs-]-p, M. Bürgisser, M. A. Clausen, and . Shokrollahi, Algebraic Complexity Theory, Grund. der Math. Wiss, vol.315, 1997.

. Bd-]-k, J. Baur, and . Draisma, Secant dimensions of low-dimensional homogeneous varieties, Preprint arXiv:math, RT, pp.707-1605, 2007.

. C. Bo-]-m, G. Brambilla, and . Ottaviani, On the Alexander-Hirschowitz theorem, J. Pure Appl. Algebra, vol.212, issue.5, pp.1229-1251, 2008.

]. E. Cach, J. V. Carlini, and . Chipalkatti, On Waring's problem for several algebraic forms, Comment . Math. Helv, vol.78, issue.3, pp.494-517, 2003.

]. L. Chci, C. Chiantini, and . Ciliberto, The Grassmannians of secant varieties of curves are not defective, Indag. Math, vol.13, pp.23-28, 2002.

M. V. Catalisano, A. V. Geramita, and A. Gimigliano, Higher secant varieties of Segre- Veronese varieties, Projective varieties with unexpected properties, pp.81-107, 2005.

]. P. Ch and . Chevalier, Optimal separation of independent narrow-band sources -concept and performance Special issue on blind separation and deconvolution. [Co1] P. Comon, Independent Component Analysis, Higher Order Statistics, pp.27-48, 1992.

]. P. Co2 and . Comon, Tensor decompositions, Math. Signal Processing, 2002.

M. [. Comon and . Rajih, Blind identification of under-determined mixtures based on the characteristic function, Signal Process, pp.2271-2281, 2006.

]. L. De-lathauwer and J. Castaing, Tensor-based techniques for the blind separation of DS???CDMA signals, Signal Processing, vol.87, issue.2, pp.322-336, 2007.
DOI : 10.1016/j.sigpro.2005.12.015

L. De-lathauwer, B. De-moor, and J. Vandewalle, A Multilinear Singular Value Decomposition, SIAM Journal on Matrix Analysis and Applications, vol.21, issue.4, pp.1253-1278, 2000.
DOI : 10.1137/S0895479896305696

. C. Dm-]-m and J. Dogan, Applications of cumulants to array processing .I. aperture extension and array calibration, IEEE Trans. Sig. Proc, vol.43, issue.5, pp.1200-1216, 1995.

]. R. Gr and . Grone, Decomposable tensors as a quadratic variety, Proc. Am, pp.227-230, 1977.

N. [. Jiang and . Sidiropoulos, Kruskal's Permutation Lemma and the Identification of CANDECOMP/PARAFAC and Bilinear Models with Constant Modulus Constraints, IEEE Transactions on Signal Processing, vol.52, issue.9, pp.2625-2636, 2004.
DOI : 10.1109/TSP.2004.832022

]. J. Hr and . Harris, Algebraic Geometry, a First Course, 1993.

]. F. Lo and . London, Ueber die Polarfiguren der ebenen Curven dritter Ordnung, Typical tensorial rank, pp.535-584, 1890.

. D. Sbg-]-n, R. Sidiropuolos, J. B. Bro, and . Giannakis, Parallel factor analysis in sensor array processing, IEEE Trans. Signal Processing, pp.48-2377, 2000.

]. V. St and . Strassen, Rank and optimal computation of generic tensor Sulle V k per cui la varietà degli S h (h + 1)-seganti ha dimensione minore dell'ordinario, Rend, Linear Algebra Appl. Circ. Mat. Palermo, vol.52, pp.645-685, 1911.

]. A. Te1 and . Terracini, Sulla rappresentazione delle coppie di forme ternarie mediante somme di potenze di forme lineari, pp.91-100, 1915.

]. F. Za and . Zak, Tangents and Secants of Algebraic Varieties (Translations of, Math.Monographs, vol.127, 1993.

(. A. Bernardi, . Cirm, and . Fbk, 38123 Povo (Trento), Italy E-mail address, E-mail address: enrico.carlini@polito.it (M.V.Catalisano) DIPTEM -Dipartimento di Ingegneria della Produzione, Termoenergetica e Modelli Matematici

I. Genoa, E-mail address: catalisano@diptem.unige