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News/Minimax Limits of k-Fold Cross-Validation via Majority
arxiv
PublishedMay 26, 2026 at 4:00 AM

Minimax Limits of k-Fold Cross-Validation via Majority

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arXiv:2605.25859v1 Announce Type: cross Abstract: We study the mean-squared error of $k$-fold cross-validation as a risk estimator, with particular emphasis on how its accuracy depends on the number of folds $k$. Despite the widespread use of cross-validation, principled guidance for choosing $k$ is

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