@misc{dong2021attention,
  title={Attention is Not All You Need: Pure Attention Loses Rank Doubly Exponentially with Depth},
  author={Yihe Dong and Jean-Baptiste Cordonnier and Andreas Loukas},
  year={2021},
  eprint={2103.03404},
  archivePrefix={arXiv},
  primaryClass={cs.LG},
  url={https://arxiv.org/abs/2103.03404}
}