@inproceedings{zhang-zuo-2025-grpo,
    title = "{GRPO}-{LEAD}: A Difficulty-Aware Reinforcement Learning Approach for Concise Mathematical Reasoning in Language Models",
    author = "Zhang, Jixiao  and
      Zuo, Chunsheng",
    editor = "Christodoulopoulos, Christos  and
      Chakraborty, Tanmoy  and
      Rose, Carolyn  and
      Peng, Violet",
    booktitle = "Proceedings of the 2025 Conference on Empirical Methods in Natural Language Processing",
    month = nov,
    year = "2025",
    address = "Suzhou, China",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/ingest-emnlp/2025.emnlp-main.287/",
    pages = "5642--5665",
    ISBN = "979-8-89176-332-6"
}