期刊
SIAM JOURNAL ON MATRIX ANALYSIS AND APPLICATIONS
卷 26, 期 2, 页码 295-327出版社
SIAM PUBLICATIONS
DOI: 10.1137/S089547980139786X
关键词
multilinear algebra; higher-order tensor; canonical decomposition; parallel factors analysis; generalized Schur decomposition
The canonical decomposition of higher-order tensors is a key tool in multilinear algebra. First we review the state of the art. Then we show that, under certain conditions, the problem can be rephrased as the simultaneous diagonalization, by equivalence or congruence, of a set of matrices. Necessary and sufficient conditions for the uniqueness of these simultaneous matrix decompositions are derived. In a next step, the problem can be translated into a simultaneous generalized Schur decomposition, with orthogonal unknowns [A.-J. van der Veen and A. Paulraj, IEEE Trans. Signal Process., 44 (1996), pp. 1136-1155]. A first-order perturbation analysis of the simultaneous generalized Schur decomposition is carried out. We discuss some computational techniques (including a new Jacobi algorithm) and illustrate their behavior by means of a number of numerical experiments.
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