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Chang He ( 何畅 ) Hi, welcome to my homepage! I am a final-year PhD student in the Research Institute for Interdisciplinary Sciences at Shanghai University of Finance and Economics, fortunately advised by Professor Bo Jiang. Prior to this, I received my Bachelor's degree from the School of Mathematical Sciences at East China Normal University in 2021.
My research interests are continuous optimization problems arising in machine learning, operations research, and other applications. Recently, I have mainly worked on Riemannian optimization.
Currently, I am a visiting student in the Department of Industrial and Systems Engineering at University of Minnesota, working with Professor Shuzhong Zhang.
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(Photo taken @ Chicago)
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Publications(* denotes equal contribution, α–β denotes alphabetical order) |
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A Homogeneous Second-Order Descent Method for Nonconvex Optimization
Chuwen Zhang, Chang He, Yuntian Jiang, Chenyu Xue, Bo Jiang, Dongdong Ge, Yinyu Ye Mathematics of Operations Research, 2025 [link] |
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Homogeneous Second-Order Descent Framework: A Fast Alternative to Newton-Type Methods
Chang He*, Yuntian Jiang*, Chuwen Zhang*, Dongdong Ge, Bo Jiang, Yinyu Ye Mathematical Programming, 2025 [link][slides] 2025 iSoGO Student Paper Award [link] |
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Riemannian Accelerated Zeroth-Order Algorithm: Improved Robustness and Lower Query Complexity
Chang He, Zhaoye Pan, Xiao Wang, Bo Jiang International Conference on Machine Learning, 2024 [link] |
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Dynamic Regret for Online Proximal Newton’s Method
Chang He, Zhaoye Pan, Bo Jiang International Conference on Applied Mathematics and Computer Science, 2024 [link] |
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Quaternion Matrix Decomposition and its Theoretical Implications
Chang He, Bo Jiang, Xihua Zhu (α–β) Journal of Global Optimization, 2023 [link] |
Papers Under Revision/Review |
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The Second-Order Tâtonnement: Decentralized Interior-Point Methods for Market Equilibrium
Chuwen Zhang, Chang He, Bo Jiang, Yinyu Ye Submitted [link][slides] |
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Non-Stationary Bandit Convex Optimization: An Optimal Algorithm with Two-Point Feedback
Chang He, Bo Jiang, Shuzhong Zhang Submitted [link] |
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Federated Learning on Riemannian Manifolds: A Gradient-Free Projection-Based Approach
Hongye Wang*, Zhaoye Pan*, Chang He*, Jiaxiang Li, Bo Jiang Submitted [link] |
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On Relatively Smooth Optimization over Riemannian Manifolds
Chang He, Jiaxiang Li, Bo Jiang, Shiqian Ma, Shuzhong Zhang Submitted [link] |
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Beyond Nonconvexity: A Universal Trust-Region Method with New Analyses
Yuntian Jiang, Chang He, Chuwen Zhang, Dongdong Ge, Bo Jiang, Yinyu Ye Major Revision under Journal of Scientific Computing [link] |
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On Approximation Algorithms for Commutative Quaternion Polynomial Optimization
Chang He, Bo Jiang, Hongye Wang, Xihua Zhu (α–β) Minor Revision under Journal of Global Optimization |
Technical Reports |
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DRSOM: A Dimension Reduced Second-Order Method
Chuwen Zhang, Dongdong Ge, Chang He, Bo Jiang, Yuntian Jiang, Yinyu Ye. Preprint [link] |
Services |
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Website's source code. |