@inproceedings{graphoraclemodelslowerboundsandgapsfor,
  title = {Graph Oracle Models, Lower Bounds, and Gaps for Parallel Stochastic Optimization},
  author = {Blake Woodworth and Jialei Wang and Adam Smith and Brendan Mcmahan and Nathan Srebro},
  year = {2018},
  booktitle = {NeurIPS 2018 12},
  eprint = {1805.10222},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1805.10222v3},
}