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Chang He Hi, welcome to my homepage! I am a fourth-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 operations research, online learning and other applications. Recently, I have been working on second-order and higher-order methods, and Riemannian optimization.
Currently, I am a visiting student at at University of Minnesota, working with Professor Shuzhong Zhang.
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(Photo taken @ Chicago)
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Publications(* denotes equal contribution, ^ denotes the corresponding author(s)) |
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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] |
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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 Journal of Global Optimization, 2023 [link] |
Papers Under Revision/Review |
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On Approximation Algorithms for Commutative Quaternion Polynomial Optimization
Chang He, Bo Jiang, Hongye Wang^, Xihua Zhu Submitted |
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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 Submitted [link] |
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DRSOM: A Dimension Reduced Second-Order Method
Chuwen Zhang, Dongdong Ge^, Chang He, Bo Jiang, Yuntian Jiang, Yinyu Ye Working paper [link] |
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Website's source code. |