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Riemannian Laplace Approximation with the Fisher Metric
March 27, 2024, 4:43 a.m. | Hanlin Yu, Marcelo Hartmann, Bernardo Williams, Mark Girolami, Arto Klami
cs.LG updates on arXiv.org arxiv.org
Abstract: Laplace's method approximates a target density with a Gaussian distribution at its mode. It is computationally efficient and asymptotically exact for Bayesian inference due to the Bernstein-von Mises theorem, but for complex targets and finite-data posteriors it is often too crude an approximation. A recent generalization of the Laplace Approximation transforms the Gaussian approximation according to a chosen Riemannian geometry providing a richer approximation family, while still retaining computational efficiency. However, as shown here, its …
abstract approximation arxiv bayesian bayesian inference cs.lg data distribution fisher inference laplace approximation stat.me stat.ml targets theorem type
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