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@inproceedings{wencai2022irreducibility,
  title={Irreducibility of the Fermi variety for discrete periodic Schr\"odinger operators and embedded eigenvalues},
  author={Wencai Liu},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20221206112618136953742},
  booktitle={ Geom. Funct. Anal. },
  volume={32},
  number={1},
  year={2022},
}