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Ji-Ha's Blog

jiha-kim.github.io · 377 words · saved by 2 readers

Ji-Ha Kim’s blog for sharing things.

Post When Equivalent Weights Train Differently Why coordinate-level optimizers can behave differently on weights that represent the same model, and how quotient-aware updates remove the hidden gauge. May 6, 2026 Machine Learning , Mathematical Optimization Fast Tight Spectral-Norm Bounds A GPU-friendly algorithm for tight certified singular-value endpoint bounds using scaled Gram matrices, SYRKs, Frobenius reductions, and a small scalar moment problem. Apr 28, 2026 Numerical Linear Algebra , Matrix Computations Autoregression vs Diffusion - Understanding Sampling via Optimal…

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