A Gaussian Process integrated-variance utility, updated via Schur complements, computes Shapley data values with less retraining, but the method is numerically unstable in practice.
Notes on the schur complement
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On the Usage of Gaussian Process for Efficient Data Valuation
A Gaussian Process integrated-variance utility, updated via Schur complements, computes Shapley data values with less retraining, but the method is numerically unstable in practice.