@article{JMLR:v25:24-0162,
  author  = {Nicolas Boull{{\'e}} and Diana Halikias and Samuel E. Otto and Alex Townsend},
  title   = {Operator learning without the adjoint},
  journal = {Journal of Machine Learning Research},
  year    = {2024},
  volume  = {25},
  number  = {364},
  pages   = {1--54},
  url     = {http://jmlr.org/papers/v25/24-0162.html}
}