@article{metagradadaptationusingmultiplelearning,
  title = {MetaGrad: Adaptation using Multiple Learning Rates in Online Learning},
  author = {Tim van Erven and Wouter M. Koolen and Dirk van der Hoeven},
  year = {2021},
  eprint = {2102.06622},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2102.06622v2},
}