@article{onthesaddlepointproblemfornonconvex,
  title = {On the saddle point problem for non-convex optimization},
  author = {Razvan Pascanu and Yann N. Dauphin and Surya Ganguli and Yoshua Bengio},
  year = {2014},
  eprint = {1405.4604},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1405.4604v2},
}