@article{polaradamwdisentanglingspectralcontrolan,
  title = {PolarAdamW: Disentangling Spectral Control and Schur Gauge-Equivariance in Matrix Optimisation},
  author = {Haozhou Zhang},
  year = {2026},
  eprint = {2605.07067},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2605.07067},
}