@article{expressivityofcongruencebasedarchitectur,
  title = {Expressivity of congruence-based architectures for DNNs on positive-definite matrices},
  author = {Antonin Oswald and Estelle Massart},
  year = {2026},
  eprint = {2606.02490},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2606.02490},
}