@article{versatilesingleloopmethodforgradient,
  title = {Versatile Single-Loop Method for Gradient Estimator: First and Second Order Optimality, and its Application to Federated Learning},
  author = {Kazusato Oko and Shunta Akiyama and Tomoya Murata and Taiji Suzuki},
  year = {2022},
  eprint = {2209.00361},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2209.00361v2},
}