@article{exactandapproximatealgorithmsforpolytree,
  title = {Exact and Approximate Algorithms for Polytree Learning},
  author = {Juha Harviainen and Frank Sommer and Manuel Sorge},
  year = {2026},
  eprint = {2605.03622},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2605.03622},
}