About Me

I am now a Ph.D. student at Institute for Interdisciplinary Information Sciences, Tsinghua University, advised by Professor Jingzhao Zhang. Previously, I did my undergraduate at School of Data Science, Fudan University, advised by Professor Luo Luo.

Selected Papers

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

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

Teaching Assistant

• [Optimization Theory 2023] , Spring, Fudan University.

• [Introduction to Optimization 2023] , Fall, Tsinghua University.