Author

Dongwook Shin

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Jul 2026

Mini-batch Noise Lowers Sharpness via Dominant-Subspace Fluctuations

This work shows how the averaged gradient over fluctuations in the dominant directions produces a sharpness correction term, and derive a sharpness correction term induced by mini-batch noise in the dominant directions, which brings the sharpness evolution of GD closer to that of SGD.

Jun-Ho So, Dongwook Shin · arXiv.org · 1 citation