@article{searchhardnessawarellmbasedproblemformul,
  title = {Search Hardness-Aware LLM-Based Problem Formulation for Expensive Simulation-Driven Design},
  author = {Yuchen Li and Handing Wang and Bing Xue and Mengjie Zhang},
  year = {2026},
  eprint = {2607.21220},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2607.21220},
}