@article{JMLR:v22:20-533,
  author  = {Mingrui Liu and Hassan Rafique and Qihang Lin and Tianbao Yang},
  title   = {First-order Convergence Theory for Weakly-Convex-Weakly-Concave Min-max Problems},
  journal = {Journal of Machine Learning Research},
  year    = {2021},
  volume  = {22},
  number  = {169},
  pages   = {1--34},
  url     = {http://jmlr.org/papers/v22/20-533.html}
}