@article{whensharpeningbecomescollapsesamplingbia,
  title = {When Sharpening Becomes Collapse: Sampling Bias and Semantic Coupling in RL with Verifiable Rewards},
  author = {Mingyuan Fan and Weiguang Han and Daixin Wang and Cen Chen and Zhiqiang Zhang and Jun Zhou},
  year = {2026},
  eprint = {2601.15609},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2601.15609},
}