@article{adagradstepsizessharpconvergenceover,
  title = {AdaGrad stepsizes: Sharp convergence over nonconvex landscapes},
  author = {Rachel Ward and Xiaoxia Wu and Leon Bottou},
  year = {2018},
  eprint = {1806.01811},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/1806.01811v8},
}