Publications

You can find my articles on my Google Scholar.

* denotes equal contributions.

Recent Preprints

• On Finding Small Hyper-Gradients in Bilevel Optimization: Hardness Results and Improved Analysis.
  Lesi Chen*, Jing Xu*, and Jingzhang Zhang. [arXiv 2024]

• Near-Optimal Nonconvex-Strongly-Convex Bilevel Optimization with Fully First-Order Oracles.
  Lesi Chen*, Yaohua Ma*, and Jingzhang Zhang. [arXiv 2023]

• Near-Optimal Algorithms for Making the Gradient Small in Stochastic Minimax Optimization.
  Lesi Chen* and Luo Luo. [arXiv 2022]

Conference Publications

• An Efficient Stochastic Algorithm for Decentralized Nonconvex-Strongly-Concave Minimax Optimization.
  Lesi Chen, Haishan Ye, and Luo Luo. [AISTATS 2024]

• Communication Efficient Distributed Newton Method with Fast Convergence Rates.
  Chengchang Liu, Lesi Chen, Luo Luo, and John C.S. Lui. [SIDKDD 2023]

• Faster Gradient-Free Algorithms for Nonsmooth Nonconvex Stochastic Optimization.
  Lesi Chen, Jing Xu, and Luo Luo. [ICML 2023]

• Faster Stochastic Algorithms for Minimax Optimization under Polyak-Łojasiewicz Condition.
  Lesi Chen, Boyuan Yao, and Luo Luo. [NeurIPS 2022]