A positive definite polynomial Hessian that does not factor

Amir Ali Ahmadi, Pablo A. Parrilo. A positive definite polynomial Hessian that does not factor. In Proceedings of the 48th IEEE Conference on Decision and Control, CDC 2009, combined withe the 28th Chinese Control Conference, December 16-18, 2009, Shanghai, China. pages 1195-1200, IEEE, 2009. [doi]

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