Publications

My full publications list is on Google Scholar. (Due to the possibility of making minor updates to the published version on arXiv, please refer to the following links on my homepage for the latest version of my publications if you are interested in them)

Note that * denotes equal contributions.

Recent Preprints

• Computationally Faster Newton Methods by Lazy Evaluations.
  Lesi Chen, Chengchang Liu, Luo Luo, and Jingzhao Zhang. [arXiv 2025]

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

Selected Publications

• Second-Order Min-Max Optimization with Lazy Hessians.
  Lesi Chen*, Chengchang Liu*, and Jingzhao Zhang. [ICLR 2025] Oral

• Near-Optimal Algorithms for Making the Gradient Small in Stochastic Minimax Optimization.
  Lesi Chen and Luo Luo. [JMLR 2024]

• Functionally Constrained Algorithm Solves Convex Simple Bilevel Problems.
  Huaqing Zhang*, Lesi Chen*, Jing Xu, and Jingzhao Zhang. [NeurIPS 2024]

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

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