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Hypergraph characterizations of copositive tensors |
Yue WANG, Jihong SHEN(), Changjiang BU |
College of Intelligent Systems Science and Engineering, Harbin Engineering University, Harbin 150001, China |
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Abstract A real symmetric tensor is copositive (resp., strictly copositive) if (resp., ) for any nonzero nonnegative vector: By using the associated hypergraph of , we give necessary and sufficient conditions for the copositivity of : For a real symmetric tensor satisfying the associated negative hypergraph and associated positive hypergraph are edge disjoint subhypergraphs of a supertree or cored hypergraph, we derive criteria for the copositivity of : We also use copositive tensors to study the positivity of tensor systems.
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Keywords
Copositive tensor
hypergraph
positive system
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Corresponding Author(s):
Jihong SHEN
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Issue Date: 14 July 2021
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