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What is Learnable in Valiant's Theory of the Learnable? 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Constructing Bayes Minimax Estimators through Integral Transformations
Dominique Fourdrinier, William E. Strawderman, Martin T. Wells · 2025-05-12 · via math.ST updates on arXiv.org

The problem of Bayes minimax estimation for the mean of a multivariate normal distribution under quadratic loss has attracted significant attention recently. These estimators have the advantageous property of being admissible, similar to Bayes procedures, while also providing the conservative risk guarantees typical of frequentist methods. This paper demonstrates that Bayes minimax estimators can be derived using integral transformation techniques, specifically through the \( I \)-transform and the Laplace transform, as long as appropriate spherical priors are selected. Several illustrative examples are included to highlight the effectiveness of the proposed approach.

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