Calculus of Variations and Geometric Measure Theory

N. Apollonio - G. Franzina - G. L. Torrisi

On Bayesian Neural Networks with Dependent and Possibly Heavy-Tailed Weights

created by franzina on 29 Jul 2025
modified on 14 Jan 2026

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Inserted: 29 jul 2025
Last Updated: 14 jan 2026

Year: 2025

Abstract:

In this paper we consider posterior Bayesian fully connected and feedforward deep neural networks with dependent weights. Particularly, if the likelihood is Gaussian, we identify the distribution of the wide width limit and provide an algorithm to sample from the network. In the shallow case we explicitly compute the distribution of the output, proving that it is a Gaussian mixture. All the theoretical results are numerically validated.


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