@article{grpoleadadifficultyawarereinforcement1,
  title = {GRPO-LEAD: A Difficulty-Aware Reinforcement Learning Approach for Concise Mathematical Reasoning in Language Models},
  author = {Jixiao Zhang and Chunsheng Zuo},
  year = {2025},
  eprint = {2504.09696},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2504.09696v1},
}