@article{emphatictdbellmanoperatorisacontraction,
  title = {Emphatic TD Bellman Operator is a Contraction},
  author = {Assaf Hallak and Aviv Tamar and Shie Mannor},
  year = {2015},
  eprint = {1508.03411},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1508.03411v2},
}