Non-zero activation mean causes pathological landscapes and slow convergence

ZimingLiu11 · x · 2026-10-31

Part 2 of Ziming Liu's thread: the non-zero mean from asymmetric activations leads to pathological loss landscapes, causing representation overshooting and slower convergence later in training, with figures comparing loss curves, representation trajectories, and landscape geometry before vs. after the fix.

Related event: Ziming Liu: Popular activations have non-zero mean; negative shift stabilizes training(8 posts)→

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