HatLLM: Hierarchical Attention Masking for Enhanced Collaborative Modeling in LLM-based Recommendation

@misc{cuiMon Oct 13 2025 03:05:03 GMT+0000 (Coordinated Universal Time)hatllmhierarchicalattention,
      title={HatLLM: Hierarchical Attention Masking for Enhanced Collaborative Modeling in LLM-based Recommendation},
      author={Yu Cui and Feng Liu and Jiawei Chen and Canghong Jin and Xingyu Lou and Changwang Zhang and Jun Wang and Yuegang Sun and Can Wang},
      year={Mon Oct 13 2025 03:05:03 GMT+0000 (Coordinated Universal Time)},
      eprint={2510.10955},
      archivePrefix={arXiv},
      primaryClass={cs.IR},
      url={https://arxiv.org/abs/2510.10955},
}