@article{geometricseparationandconstructiveuniver,
  title = {Geometric separation and constructive universal approximation with two hidden layers},
  author = {Chanyoung Sung},
  year = {2026},
  eprint = {2602.12482},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2602.12482},
}