@article{errorlowerboundsofconstantstepsize,
  title = {Error Lower Bounds of Constant Step-size Stochastic Gradient Descent},
  author = {Zhiyan Ding and Yiding Chen and Qin Li and Xiaojin Zhu},
  year = {2019},
  eprint = {1910.08212},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/1910.08212v1},
}