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This paper proposes tight semidefinite relaxations for polynomial optimization. The optimality conditions are investigated. We show that generally Lagrange multipliers can be expressed as polynomial functions in decision variables over the…

Optimization and Control · Mathematics 2018-04-09 Jiawang Nie

This paper studies the hierarchy of sparse matrix Moment-SOS relaxations for solving sparse polynomial optimization problems with matrix constraints. First, we prove a sufficient and necessary condition for the sparse hierarchy to be tight.…

Optimization and Control · Mathematics 2025-10-06 Jiawang Nie , Zheng Qu , Xindong Tang , Linghao Zhang

This paper studies the matrix Moment-SOS hierarchy for solving polynomial matrix optimization. Our first result is to show the finite convergence of this hierarchy, if the nondegeneracy condition, strict complementarity condition and second…

Optimization and Control · Mathematics 2026-05-05 Lei Huang , Jiawang Nie

This paper studies bilevel polynomial optimization problems. To solve them, we give a method based on polynomial optimization relaxations. Each relaxation is obtained from the Kurash-Kuhn-Tucker (KKT) conditions for the lower level…

Optimization and Control · Mathematics 2021-06-11 Jiawang Nie , Li Wang , Jane Ye , Suhan Zhong

This paper considers polynomial optimization with unbounded sets. We give a homogenization formulation and propose a hierarchy of Moment-SOS relaxations to solve it. Under the assumptions that the feasible set is closed at infinity and the…

Optimization and Control · Mathematics 2026-05-05 Lei Huang , Jiawang Nie , Ya-Xiang Yuan

We study a class of polynomial optimization problems with a robust polynomial matrix inequality (PMI) constraint where the uncertainty set itself is defined also by a PMI. These can be viewed as matrix generalizations of semi-infinite…

Optimization and Control · Mathematics 2024-10-10 Feng Guo , Jie Wang

This paper studies the sparse Moment-SOS hierarchy of relaxations for solving sparse polynomial optimization problems. We show that this sparse hierarchy is tight if and only if the objective can be written as a sum of sparse nonnegative…

Optimization and Control · Mathematics 2025-05-06 Jiawang Nie , Zheng Qu , Xindong Tang , Linghao Zhang

We provide a correction to the sufficient conditions under which closed-form expressions for the optimal Lagrange multiplier are provided in arXiv:2112.13138 [math.OC]. We first present a simple counterexample where the original conditions…

Optimization and Control · Mathematics 2025-03-13 Henri Lefebvre , Anirudh Subramanyam

We study an optimization problem in which the objective is given as a sum of logarithmic-polynomial functions. This formulation is motivated by statistical estimation principles such as maximum likelihood estimation, and by loss functions…

Optimization and Control · Mathematics 2026-01-07 Jiyoung Choi , Jiawang Nie , Xindong Tang , Suhan Zhong

We consider the Moment-SOS hierarchy in polynomial optimization. We first provide a sufficient condition to solve the truncated K-moment problem associated with a given degree-$2n$ pseudo-moment sequence $\phi$ n and a semi-algebraic set $K…

Optimization and Control · Mathematics 2025-01-13 Jean B Lasserre

In this paper, we address the effective degree bound problem for Lasserre's hierarchy of moment-sum-of-squares (SOS) relaxations in polynomial optimization involving $n$ variables. We assume that the first $n$ equality constraint…

Optimization and Control · Mathematics 2025-06-03 Zheng Hua , Zheng Qu

This paper proposes a bilevel hierarchy of strengthened complex moment relaxations for complex polynomial optimization. The key trick entails considering a class of positive semidefinite conditions that arise naturally in characterizing the…

Optimization and Control · Mathematics 2025-05-12 Jie Wang

We propose a method for verifying that a given feasible point for a polynomial optimization problem is globally optimal. The approach relies on the Lasserre hierarchy and the result of Lasserre regarding the importance of the convexity of…

Optimization and Control · Mathematics 2021-01-05 Sikun Xu , Ruoyi Ma , Daniel K. Molzahn , Hassan Hijazi , Cédric Josz

This paper studies generalized semi-infinite programs (GSIPs) given by polynomials. We propose a hierarchy of polynomial optimization relaxations to solve them. They are based on Lagrange multiplier expressions and polynomial extensions.…

Optimization and Control · Mathematics 2025-04-15 Xiaomeng Hu , Jiawang Nie

This paper is concerned with polynomial optimization problems. We show how to exploit term (or monomial) sparsity of the input polynomials to obtain a new converging hierarchy of semidefinite programming relaxations. The novelty (and…

Optimization and Control · Mathematics 2020-05-14 Jie Wang , Victor Magron , Jean-Bernard Lasserre

This paper studies the polynomial optimization problem whose feasible set is a union of several basic closed semialgebraic sets. We propose a unified hierarchy of Moment-SOS relaxations to solve it globally. Under some assumptions, we prove…

Optimization and Control · Mathematics 2024-05-21 Jiawang Nie , Linghao Zhang

This paper studies the copositive optimization problem whose objective is a sparse polynomial, with linear constraints over the nonnegative orthant. We propose sparse Moment-SOS relaxations to solve it. Necessary and sufficient conditions…

Optimization and Control · Mathematics 2026-04-02 Suhan Zhong , Jinling Zhou , Jiawang Nie , Xindong Tang

With the potential to find global solutions, significant research interest has focused on convex relaxations of the non-convex OPF problem. Recently, "moment-based" relaxations from the Lasserre hierarchy for polynomial optimization have…

Optimization and Control · Mathematics 2016-03-17 Daniel K. Molzahn , Cedric Josz , Ian A. Hiskens , Patrick Panciatici

In this paper, we study variational inequality problems (VIPs) with involved mappings and feasible sets characterized by polynomial functions (namely, polynomial VIPs). We propose a numerical algorithm for computing solutions to polynomial…

Optimization and Control · Mathematics 2023-03-22 Jiawang Nie , Defeng Sun , Xindong Tang , Min Zhang

We develop a Lagrange multiplier theory for nonconvex set-valued optimization problems under Lipschitz-type regularity conditions. Instead of classical continuous linear functionals, we introduce closed convex processes -- set-valued…

Optimization and Control · Mathematics 2026-02-09 Fernando García-Castaño , Miguel Ángel Melguizo-Padial
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