Early-stopped gradient descent achieves the minimax-optimal classification error for Gaussian mixtures with label noise under fast-decaying covariance spectra, while interpolating classifiers can be exponentially worse.
Bartlett, Olivier Bousquet, and Shahar Mendelson
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Minimax Optimal Early-Stopped Gradient Descent for Gaussian Mixture Classification
Early-stopped gradient descent achieves the minimax-optimal classification error for Gaussian mixtures with label noise under fast-decaying covariance spectra, while interpolating classifiers can be exponentially worse.