@article{JMLR:v23:20-1469,
  author  = {Hiroaki Sasaki and Takashi Takenouchi},
  title   = {Representation Learning for Maximization of MI, Nonlinear ICA and Nonlinear Subspaces with Robust Density Ratio Estimation},
  journal = {Journal of Machine Learning Research},
  year    = {2022},
  volume  = {23},
  number  = {231},
  pages   = {1--55},
  url     = {http://jmlr.org/papers/v23/20-1469.html}
}