@article{d2evodualdifficultyawareselfevolutionfor,
  title = {D$^2$Evo: Dual Difficulty-Aware Self-Evolution for Data-Efficient Reinforcement Learning},
  author = {Ru Zhang and Renda Li and Ziyu Ma and Weijie Qiu and Chongyang Tao and Yong Wang and Xiangxiang Chu},
  year = {2026},
  eprint = {2605.17037},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2605.17037},
}