The necessary and sufficient conditions of copositive tensors

Abstract

In this paper, it is proved that (strict) copositivity of a symmetric tensor $\mathcal{A}$ is equivalent to the fact that every principal sub-tensor of $\mathcal{A}$ has no a (non-positive) negative $H^{++}$-eigenvalue. The necessary and sufficient conditions are also given in terms of the $Z^{++}$-eigenvalue of the principal sub-tensor of the given tensor. This presents a method of testing (strict) copositivity of a symmetric tensor by means of the lower dimensional tensors. Also the equivalent definition of strictly copositive tensors is given on entire space ${\mathbb{R}}^n$.

13 pages. arXiv admin note: text overlap with arXiv:1302.6085

References in corpus (1)

• H${}^{+}$-Eigenvalues of Laplacian and Signless Laplacian Tensors

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