SGD stabilizes sharpness below 2/η with equilibrium gap ΔS = η β σ_u²/(4α) due to noise-enhanced stochastic self-stabilization.
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SGD at the Edge of Stability: The Stochastic Sharpness Gap
SGD stabilizes sharpness below 2/η with equilibrium gap ΔS = η β σ_u²/(4α) due to noise-enhanced stochastic self-stabilization.