@article{hizfohierarchicalzerothandfirstorderllmf,
  title = {Hi-ZFO: Hierarchical Zeroth- and First-Order LLM Fine-Tuning via Importance-Guided Tensor Selection},
  author = {Feihu Jin and Ying Tan},
  year = {2026},
  eprint = {2601.05501},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2601.05501},
}