@article{themultiscalesingleindexmodelastylizedmo,
  title = {The Multiscale Single-Index Model: A Stylized Model for Hierarchical Feature Learning},
  author = {Joan Bruna},
  year = {2026},
  eprint = {2607.03347},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2607.03347},
}