@article{aconcentrationinequalityfortheexcess,
  title = {A concentration inequality for the excess risk in least-squares regression with random design and heteroscedastic noise},
  author = {Adrien Saumard},
  year = {2017},
  eprint = {1702.05063},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1702.05063v2},
}