@inproceedings{li-etal-2025-happened,
    title = "What Happened in {LLM}s Layers when Trained for Fast vs. Slow Thinking: A Gradient Perspective",
    author = "Li, Ming  and
      Li, Yanhong  and
      Zhou, Tianyi",
    editor = "Che, Wanxiang  and
      Nabende, Joyce  and
      Shutova, Ekaterina  and
      Pilehvar, Mohammad Taher",
    booktitle = "Proceedings of the 63rd Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers)",
    month = jul,
    year = "2025",
    address = "Vienna, Austria",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/landing_page/2025.acl-long.1545/",
    pages = "32017--32154",
    ISBN = "979-8-89176-251-0"
}