@article{selfimprovementcanselfregresstheriseandc,
  title = {Self-Improvement Can Self-Regress: The Rise-and-Collapse Failure Mode of LLM Self-Training},
  author = {Jianzhe Lin},
  year = {2026},
  eprint = {2606.21090},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2606.21090},
}