@article{optimallowerboundsforonlinemulticalibrat,
  title = {Optimal Lower Bounds for Online Multicalibration},
  author = {Natalie Collina and Jiuyao Lu and Georgy Noarov and Aaron Roth},
  year = {2026},
  eprint = {2601.05245},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2601.05245},
}