@article{fastapproximationoforthogonalmatricesand,
  title = {Fast approximation of orthogonal matrices and application to PCA},
  author = {Cristian Rusu and Lorenzo Rosasco},
  year = {2019},
  eprint = {1907.08697},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/1907.08697v5},
}