@article{estimatingunboundeddensityratios,
  title = {Estimating Unbounded Density Ratios: Applications in Error Control under Covariate Shift},
  author = {Shuntuo Xu and Zhou Yu and Jian Huang},
  year = {2025},
  eprint = {2504.01031},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2504.01031v1},
}