s-step self-distillation is optimal among spectral shrinkage estimators for s-spiked covariance matrices and necessary for optimality.
Optimal unconstrained self-distillation in ridge regression: Strict improvements, precise asymptotics, and one-shot tuning.arXiv preprint arXiv:2602.17565, 2026
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Self-Distillation is Optimal Among Spectral Shrinkage Estimators in Spiked Covariance Models
s-step self-distillation is optimal among spectral shrinkage estimators for s-spiked covariance matrices and necessary for optimality.