Abstract
SUMMARYWe study the least squares functional of the canonical polyadic tensor decomposition for third order tensors by eliminating one factor matrix, which leads to a reduced functional. An analysis of the reduced functional leads to several equivalent optimization problem, such as a Rayleigh quotient or a projection. These formulations are the basis of several new algorithms as follows: the Centroid Projection method for efficient computation of suboptimal solutions and fixed‐point iteration methods for approximating the best rank‐1 and the best rank‐R decompositions under certain nondegeneracy conditions. Copyright © 2013 John Wiley & Sons, Ltd.
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