@article{approximationsmoothandsparsefunctionsby,
  title = {Approximation smooth and sparse functions by deep neural networks without saturation},
  author = {Xia Liu},
  year = {2020},
  eprint = {2001.04114},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2001.04114v1},
}