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Tight lower bound of sparse covariance matrix estimation in the local differential privacy model.

Di WangJinhui Xu
Published in: Theor. Comput. Sci. (2020)
Keyphrases
  • lower bound
  • covariance matrix
  • upper bound
  • objective function
  • probabilistic model
  • em algorithm
  • privacy preserving
  • np hard
  • relevance feedback