@article{toolexpanderextendingthefrontiersoftoolu,
  title = {ToolExpander: Extending the Frontiers of Tool-Using Reinforcement Learning to Weak LLMs},
  author = {Fu Chen and Peng Wang and Xiyin Li and Wen Li and Shichi Lei and Dongdong Xiang},
  year = {2025},
  eprint = {2510.07737},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2510.07737},
}