@misc{xu2026sparserewardsubsystemlarge,
      title={Sparse Reward Subsystem in Large Language Models}, 
      author={Guowei Xu and Mert Yuksekgonul and James Zou},
      year={2026},
      eprint={2602.00986},
      archivePrefix={arXiv},
      primaryClass={cs.CL},
      url={https://arxiv.org/abs/2602.00986}, 
}