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- W2930367612 abstract "We investigate the frequentist coverage properties of credible sets resulting in from Gaussian process priors with squared exponential covariance kernel. First we show that by selecting the scaling hyper-parameter using the maximum marginal likelihood estimator in the (slightly modified) squared exponential covariance kernel the corresponding credible sets will provide overconfident, misleading uncertainty statements for a large, representative subclass of the functional parameters in context of the Gaussian white noise model. Then we show that by either blowing up the credible sets with a logarithmic factor or modifying the maximum marginal likelihood estimator with a logarithmic term one can get reliable uncertainty statement and adaptive size of the credible sets under some additional restriction. Finally we demonstrate on a numerical study that the derived negative and positive results extend beyond the Gaussian white noise model to the nonparametric regression and classification models for small sample sizes as well." @default.
- W2930367612 created "2019-04-11" @default.
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- W2930367612 date "2019-04-02" @default.
- W2930367612 modified "2023-10-16" @default.
- W2930367612 title "Can we trust Bayesian uncertainty quantification from Gaussian process priors with squared exponential covariance kernel" @default.
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