Riemannian Optimization
Optimization over Stiefel and related matrix manifolds.
Shixiang Chen 陈士祥
Assistant Professor (特任研究员), School of Mathematical Sciences, University of Science and Technology of China (USTC).
My research interests are optimization and machine learning. My recent research focuses on decentralized optimization and Riemannian optimization.
Open positions
Looking for Postdocs/research assistant (competitive salary) and self-motivated students!
Research
My research interests center on Riemannian optimization, decentralized optimization, and machine learning.
Decentralized Optimization
Distributed and consensus-based methods for networked optimization problems.
Machine Learning
Optimization methods and learning-based frameworks for machine learning models.
Selected Papers
See full listFrom Manifold Identification to Newton Acceleration on Intersections: Sparse Stiefel Optimization
Shixiang Chen, Wen Huang
Retractions by Alternating Projections
Shixiang Chen, Yixiao He, Wen Huang
Nonsmooth Optimization over the Stiefel Manifold and Beyond: Proximal Gradient Method and Recent Variants
Shixiang Chen, Shiqian Ma, Anthony Man-Cho So, Tong Zhang
Earlier version: Proximal Gradient Method for Nonsmooth Optimization over the Stiefel Manifold, SIAM J. Optim., 2020.
Decentralized Riemannian Gradient Descent on the Stiefel Manifold
Shixiang Chen, Alfredo Garcia, Mingyi Hong, Shahin Shahrampour
Weakly Convex Optimization over Stiefel Manifold Using Riemannian Subgradient-Type Methods
Xiao Li*, Shixiang Chen*, Zengde Deng, Qing Qu, Zhihui Zhu, Anthony Man-Cho So
Awards/Honors
Recent recognitions and updates.
INFORMS Computing Society Prize
SIAM Review SIGEST Award
CSIAM Young Elite Scientists Sponsorship Program
Teaching
- Operations ResearchUndergraduate, Fall, 2025, 2024, 2023, USTC
- Optimization AlgorithmsGraduate, Spring, 2024, 2023, USTC
Biography
Before joining USTC, I worked as an Algorithm Scientist at JD Explore Academy, JD.com, and was a Postdoctoral Associate at Texas A&M University.
Academic Service
Reviewer service
SIAM Journal on Optimization, Mathematical Programming, Mathematics of Operations Research, Optimization Methods and Software, Computational Optimization and Applications, Journal of Global Optimization, Optimization.
IEEE Transactions on Automatic Control, IEEE Transactions on Pattern Analysis and Machine Intelligence, IEEE Transactions on Signal Processing.
ICML (Gold reviewer), Neurips, ICLR, ACC, CDC.
Contact
School of Mathematical Sciences, University of Science and Technology of China (USTC).