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20242026
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5 papers · 1 filter

math.OC2026

Stochastic Gradient Methods with Online Scaling

Wanyu Zhang, Wenzhi Gao, Yinyu Ye +1

This paper introduces Stochastic Online Scaled Gradient Methods (SOSGM), a generalization of the recently developed adaptive preconditioning framework in arXiv:2505.23081 and arXiv…

math.OC2026

Operator Splitting Methods with Online Scaling

Wanyu Zhang, Wenzhi Gao, Madeleine Udell

This paper develops a principled framework for automatically tuning preconditioners in operator splitting methods, including forward-backward splitting, Douglas-Rachford splitting,…

math.OC2025

Enhanced PDHG for Linear Programming with Online Preconditioning

Haihao Lu, Wanyu Zhang

We present an online preconditioning technique for the primal-dual hybrid gradient (PDHG) algorithm for linear programming (LP). The method adaptively updates primal and dual preco…

math.OC2024

Orientation Determination of Cryo-EM Images Using Block Stochastic Riemannian Subgradient Methods

Wanyu Zhang, Ruili Gou, Huikang Liu +2

The determination of molecular orientations is crucial for the three-dimensional reconstruction of Cryo-EM images. Traditionally addressed using the common-line method, this challe…

math.OC2024

Restarted Primal-Dual Hybrid Conjugate Gradient Method for Large-Scale Quadratic Programming

Yicheng Huang, Wanyu Zhang, Hongpei Li +3

Convex quadratic programming (QP) is an essential class of optimization problems with broad applications across various fields. Traditional QP solvers, typically based on simplex o…