@article{sparsematrixfactorization,
  title = {Sparse Matrix Factorization},
  author = {Behnam Neyshabur and Rina Panigrahy},
  year = {2013},
  eprint = {1311.3315},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1311.3315v3},
}