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A Practical and Optimal First-Order Method for Large-Scale Convex Quadratic Programming

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arxiv 2311.07710 v4 pith:HSBTI6OU submitted 2023-11-13 math.OC

classification math.OC
keywords linearrapdhgmethodoptimalratesolvingbottleneckclass
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Convex quadratic programming (QP) is an important class of optimization problem with wide applications in practice. The classic QP solvers are based on either simplex or barrier method, both of which suffer from the scalability issue because their computational bottleneck is solving linear equations. In this paper, we design and analyze a first-order method for QP, called restarted accelerated primal-dual hybrid gradient (rAPDHG), whose computational bottleneck is matrix-vector multiplication. We show that rAPDHG has a linear convergence rate to an optimal solution when solving QP, and the obtained linear rate is optimal among a wide class of primal-dual methods. Furthermore, we connect the linear rate with a sharpness constant of the KKT system of QP, which is a standard quantity to measure the hardness of a continuous optimization problem. Numerical experiments demonstrate that both restarts and acceleration can significantly improve the performance of the algorithm. Lastly, we present PDQP.jl, an open-source solver based on rAPDHG that can be run on both GPU and CPU. With a numerical comparison with SCS and OSQP on standard QP benchmark sets and large-scale synthetic QP instances, we demonstrate the effectiveness of rAPDHG for solving QP.

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Cited by 7 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. New Understandings and Computation on Augmented Lagrangian Methods for Low-Rank Semidefinite Programming

    math.OC 2025-05 conditional novelty 7.0 of 10

    Augmented Lagrangian subproblems inherit low-rankness, strict complementarity, and quadratic growth from a primal simple SDP, making Burer-Monteiro gradient descent converge linearly.

  2. HPR-QP: A dual Halpern Peaceman-Rachford method for solving large-scale convex composite quadratic programming

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    HPR-QP solves large-scale convex composite quadratic programs with a dual Halpern Peaceman-Rachford iteration on the restricted Wolfe dual, obtaining O(1/k) KKT residual and strong GPU benchmark results.

  3. PDHCG: A Scalable First-Order Method for Large-Scale Competitive Market Equilibrium Computation

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    A restarted primal-dual method with a per-buyer bisection inner solve, run on GPUs, computes Fisher equilibria at ten-million-buyer scale and extends to Arrow-Debreu markets via fixed-point iteration.

  4. Scalable First-order Method for Certifying Optimal k-Sparse GLMs

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    A FISTA-based method with a custom PAVA computes perspective-relaxation dual bounds for k-sparse GLMs in O(p log p) per prox evaluation, enabling larger optimality certificates.

  5. Nonconvex Optimization Framework for Group-Sparse Feedback Linear-Quadratic Optimal Control: Penalty Approach

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  7. An Overview of GPU-based First-Order Methods for Linear Programming and Extensions

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    A survey of GPU-based first-order LP solvers focusing on cuPDLP, its PDHG core, theory, benchmarks, and extensions to QP, SDP, and conic programming.

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