@inproceedings{ijcai2019p665,
  title     = {Lower Bound of Locally Differentially Private Sparse Covariance Matrix  Estimation},
  author    = {Wang, Di and Xu, Jinhui},
  booktitle = {Proceedings of the Twenty-Eighth International Joint Conference on
               Artificial Intelligence, {IJCAI-19}},
  publisher = {International Joint Conferences on Artificial Intelligence Organization},
  pages     = {4788--4794},
  year      = {2019},
  month     = {7},
  doi       = {10.24963/ijcai.2019/665},
  url       = {https://doi.org/10.24963/ijcai.2019/665},
}