@misc{casgrain2020optimizing,
  title={Optimizing Optimizers: Regret-optimal gradient descent algorithms},
  author={Philippe Casgrain and Anastasis Kratsios},
  year={2020},
  eprint={2101.00041},
  archivePrefix={arXiv},
  primaryClass={cs.LG},
  url={https://arxiv.org/abs/2101.00041}
}