@article{expconcavityofpropercompositelosses,
  title = {Exp-Concavity of Proper Composite Losses},
  author = {Parameswaran Kamalaruban and Robert C. Williamson and Xinhua Zhang},
  year = {2018},
  eprint = {1805.07737},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1805.07737v1},
}