@article{postroutingarithmeticinllama3lasttokenre,
  title = {Post-Routing Arithmetic in Llama-3: Last-Token Result Writing and Rotation-Structured Digit Directions},
  author = {Yao Yan},
  year = {2026},
  eprint = {2602.19109},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2602.19109},
}