@article{mcgrpomediancenteredgrouprelativepolicyo,
  title = {MC-GRPO: Median-Centered Group Relative Policy Optimization for Small-Rollout Reinforcement Learning},
  author = {Youngeun Kim},
  year = {2026},
  eprint = {2601.22582},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2601.22582},
}