@inproceedings{ef21anewsimplertheoreticallybetterand,
  title = {EF21: A New, Simpler, Theoretically Better, and Practically Faster Error Feedback},
  author = {Peter Richtárik and Igor Sokolov and Ilyas Fatkhullin},
  year = {2021},
  booktitle = {NeurIPS 2021 12},
  eprint = {2106.05203},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2106.05203v1},
}