@article{coldcounterfactuallyguidedlengthdebiasin,
  title = {CoLD: Counterfactually-Guided Length Debiasing for Process Reward Models in Mathematical Reasoning},
  author = {Congmin Zheng and Jiachen Zhu and Jianghao Lin and Xinyi Dai and Weiwen Liu and Haoxuan Li and Yong Yu and Weinan Zhang and Mengyue Yang},
  year = {2025},
  eprint = {2507.15698},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2507.15698},
}