@article{hisaefficienthierarchicalindexingforfine,
  title = {HISA: Efficient Hierarchical Indexing for Fine-Grained Sparse Attention},
  author = {Yufei Xu and Fanxu Meng and Fan Jiang and Yuxuan Wang and Ruijie Zhou and Zhaohui Wang and Jiexi Wu and Zhixin Pan and Xiaojuan Tang and Wenjie Pei and Tongxuan Liu and Di Yin and Xing Sun and Muhan Zhang},
  year = {2026},
  eprint = {2603.28458},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2603.28458},
}