@article{transformerlearnsoptimalvariableselectio,
  title = {Transformer Learns Optimal Variable Selection in Group-Sparse Classification},
  author = {Chenyang Zhang and Xuran Meng and Yuan Cao},
  year = {2025},
  eprint = {2504.08638},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2504.08638v1},
}