@article{tamingextremetokenscovarianceawaregrpowi,
  title = {Taming Extreme Tokens: Covariance-Aware GRPO with Gaussian-Kernel Advantage Reweighting},
  author = {Cheng Wang and Qin Liu and Wenxuan Zhou and Muhao Chen},
  year = {2026},
  eprint = {2605.11538},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2605.11538},
}