@article{neuralcostatepoliciesstructuringhiddenst,
  title = {Neural Co-state Policies: Structuring Hidden States in Recurrent Reinforcement Learning},
  author = {David Leeftink and Max Hinne and Marcel van Gerven},
  year = {2026},
  eprint = {2605.05373},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2605.05373},
}