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News/When Is Muon Optimal? Radial Fragility and Minimax Geometry
arxiv
PublishedOctober 16, 2026 at 4:00 AM

When Is Muon Optimal? Radial Fragility and Minimax Geometry

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arXiv:2610.21549v1 Announce Type: cross Abstract: Muon replaces a matrix gradient by an approximate polar factor and has shown strong empirical performance in neural-network training. The Isotropic Curvature Model (ICM) provides a curvature-based explanation for this update by asking when gradient o

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