@article{globalconvergenceofagrassmanniangradient,
  title = {Global Convergence of a Grassmannian Gradient Descent Algorithm for Subspace Estimation},
  author = {Dejiao Zhang and Laura Balzano},
  year = {2015},
  eprint = {1506.07405},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1506.07405v3},
}