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arXiv 2508.08062math.OCcs.NAmath.NA
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用于求解线性规划的安德森加速原始对偶混合梯度法

Anderson Accelerated Primal-Dual Hybrid Gradient for solving LP

School of Mathematical Sciences, University of Southampton(南安普顿大学数学科学学院)

Yingxin Zhou, Stefano Cipolla, Phan Tu Vuong

AI总结:

研究如何将安德森加速集成到PDHG方法来求解LP问题,提出AA-PDHG框架并建立其全局收敛性,给出过滤变体FAA-PDHG。实验表明AA-PDHG和FAA-PDHG比普通PDHG显著加速,确立安德森加速可替代重启机制。

摘要:

我们提出了安德森加速原始对偶混合梯度法(AA-PDHG),这是一个基于不动点的框架,将安德森加速集成到原始对偶混合梯度法(PDHG)中以求解线性规划(LP)问题。核心动机是研究系统利用多步历史信息的安德森加速能否替代PDHG的重启策略。我们在一个保障条件下建立了AA-PDHG的全局收敛性,并提出了一种通过角度和长度过滤来强制系数矩阵一致有界的过滤变体(FAA-PDHG),从而提供严格的收敛保证。对源自MIPLIB 2017的LP实例进行的数值实验表明,AA-PDHG和FAA-PDHG都比普通PDHG有显著加速。在预求解的MIPLIB实例上,当两种方法都不使用原始权重更新时,AA-PDHG在约70%的基准测试中是最快的方法,当AA-PDHG和重启PDHG都使用各自的原始权重更新策略时,AA-PDHG仍然具有竞争力,确立了安德森加速作为重启机制的有竞争力的替代方案。

英文摘要:

We present the Anderson Accelerated Primal--Dual Hybrid Gradient (AA-PDHG), a fixed-point-based framework that integrates Anderson Acceleration into the PDHG method for solving linear programming (LP) problems. A central motivation is to investigate whether Anderson Acceleration, which systematically exploits multi-step historical information, can serve as a viable alternative to the restart strategy for PDHG. We establish the global convergence of AA-PDHG under a safeguard condition and propose a filtered variant (FAA-PDHG) that enforces the uniform boundedness of the coefficient matrix through angle and length filtering, thereby providing a rigorous convergence guarantee. Numerical experiments on LP instances derived from MIPLIB 2017 demonstrate that both AA-PDHG and FAA-PDHG deliver significant speedups over vanilla PDHG. On pre-solved MIPLIB instances, AA-PDHG is the fastest method on about 70% of the benchmark when neither method uses primal-weight updates, and remains competitive when both AA-PDHG and restart PDHG use their respective primal-weight update strategies, establishing Anderson Acceleration as a competitive alternative to the restart mechanism.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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