Abstract
This paper studies the hierarchy of local minimums of a polynomial in the vector space \(\mathbb {R}^n\). For this purpose, we first compute \(H\)-minimums, for which the first and second order necessary optimality conditions are satisfied. To compute each \(H\)-minimum, we construct a sequence of semidefinite relaxations, based on optimality conditions. We prove that each constructed sequence has finite convergence, under some generic conditions. A procedure for computing all local minimums is given. When there are equality constraints, we have similar results for computing the hierarchy of critical values and the hierarchy of local minimums.
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Acknowledgments
The author would like to thank Didier Henrion for his comments on using polynomial matrix inequalities in GlotpiPoly and YALMIP. He also likes to thank the editors and anonymous referees for the useful suggestions. The research was partially supported by the NSF Grants DMS-0844775 and DMS-1417985.
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Nie, J. The hierarchy of local minimums in polynomial optimization. Math. Program. 151, 555–583 (2015). https://doi.org/10.1007/s10107-014-0845-2
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DOI: https://doi.org/10.1007/s10107-014-0845-2
Keywords
- Critical point
- Local minimum
- Optimality condition
- Polynomial optimization
- Semidefinite relaxation
- Sum of squares