@article{optimizingoptimizersregretoptimalgradien,
  title = {Optimizing Optimizers: Regret-optimal gradient descent algorithms},
  author = {Philippe Casgrain and Anastasis Kratsios},
  year = {2020},
  eprint = {2101.00041},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2101.00041v2},
}