Author

Berlin Chen

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Preprint Aug 2026

Dion3: Full-Stack Orthogonal Updates

Dion3, a revision of Muon that targets this overhead at every level of the stack with a simple change to the update rule that cuts costs even further: selecting only a fraction of the momentum matrix's rows to orthogonalize at each step.

Noah Amsel, Jack Zhang, Kwangjun Ahn et al. · 0 citations