@article{optimalsemisupervisedestimationand,
  title = {Optimal and Safe Estimation for High-Dimensional Semi-Supervised Learning},
  author = {Siyi Deng and Yang Ning and Jiwei Zhao and Heping Zhang},
  year = {2020},
  eprint = {2011.14185},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2011.14185v2},
}