@article{flatnessandgradientalignmentarebothneces,
  title = {Flatness and Gradient Alignment Are Both Necessary: Spectral-Aware Gradient-Aligned Exploration for Multi-Distribution Learning},
  author = {Aristotelis Ballas and Christos Diou},
  year = {2026},
  eprint = {2605.07914},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2605.07914},
}