@article{JMLR:v22:17-298,
  author  = {Steve Hanneke},
  title   = {Learning Whenever Learning is Possible: Universal Learning under General Stochastic Processes},
  journal = {Journal of Machine Learning Research},
  year    = {2021},
  volume  = {22},
  number  = {130},
  pages   = {1--116},
  url     = {http://jmlr.org/papers/v22/17-298.html}
}