@article{refinedapproachabilityalgorithmsand,
  title = {Refined approachability algorithms and application to regret minimization with global costs},
  author = {Joon Kwon},
  year = {2020},
  eprint = {2009.03831},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2009.03831v4},
}