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University of Artificial Intelligence
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Subspace non-identifiability undermines the effectiveness of low-rank optimizers, revealing that only a fraction of gradient directions are reliably reproducible across minibatches.
Unstable BO leaderboard rankings? They're likely due to ignoring the budget ratio (B/|A|) and prior rank correlation, which this paper elegantly captures with the Portable Regime Score (PRS) to predict performance reversals.
