@article{hierarchicallearningtosolvepartial,
  title = {Hierarchical Learning to Solve Partial Differential Equations Using Physics-Informed Neural Networks},
  author = {Jihun Han and Yoonsang Lee},
  year = {2021},
  eprint = {2112.01254},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2112.01254v3},
}