@article{beyondrigidgeometriesthesplinepullbackme,
  title = {Beyond Rigid Geometries: The Spline-Pullback Metric for Universal Diffeomorphic SPD Representation Learning},
  author = {Tushar Das and Subrata Dutta and Sarmistha Neogy and Koushlendra Kumar Singh},
  year = {2026},
  eprint = {2605.04406},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2605.04406},
}