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Understanding Badly and Well-Behaved Linear Matrix Inequalities Via Semi-infinite Optimization

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Abstract

In this paper, we use a linear semi-infinite optimization approach to study badly and well-behaved linear matrix inequalities. We utilize a result on uniform LP duality of linear semi-infinite optimization problems to prove recent results obtained by Pataki. Such an approach not only provides alternative proofs of known results, but also gives new insights about badly and well-behaved linear matrix inequalities in terms of a cone and a linear subspace associated with the corresponding linear semi-infinite systems. Furthermore, when the linear matrix inequality constraint of the primal semidefinite optimization problem is badly behaved, we give a characterization of objective functions for the primal linear semidefinite optimization problem with which strong duality holds.

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Acknowledgements

The author would like to thank Professor Ken Kortanek for making the author aware of the references [7] and [8], which inspired the author to start working on this topic. The author would also like to express his gratitude to two anonymous referees for their valuable comments that greatly improve the presentation of the paper.

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Correspondence to Qinghong Zhang.

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Communicated by Sonia Cafieri.

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Zhang, Q. Understanding Badly and Well-Behaved Linear Matrix Inequalities Via Semi-infinite Optimization. J Optim Theory Appl (2024). https://doi.org/10.1007/s10957-024-02405-6

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