@inproceedings{learningovercompletehmms,
  title = {Learning Overcomplete HMMs},
  author = {Vatsal Sharan and Sham Kakade and Percy Liang and Gregory Valiant},
  year = {2017},
  booktitle = {NeurIPS 2017 12},
  eprint = {1711.02309},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1711.02309v2},
}