@article{onbileveloptimizationwithoutlowerlevel,
  title = {On Finding Small Hyper-Gradients in Bilevel Optimization: Hardness Results and Improved Analysis},
  author = {Lesi Chen and Jing Xu and Jingzhao Zhang},
  year = {2023},
  eprint = {2301.00712},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2301.00712v8},
}