Posterior Collapse of a Linear Latent Variable ModelDownload PDF

Published: 31 Oct 2022, 18:00, Last Modified: 13 Jan 2023, 15:53NeurIPS 2022 AcceptReaders: Everyone
Keywords: Bayesian deep learning, loss landscape, posterior collapse, linear model, VAE
TL;DR: This work identifies the existence and cause of a type of posterior collapse that frequently occurs in the Bayesian deep learning practice
Abstract: This work identifies the existence and cause of a type of posterior collapse that frequently occurs in the Bayesian deep learning practice. For a general linear latent variable model that includes linear variational autoencoders as a special case, we precisely identify the nature of posterior collapse to be the competition between the likelihood and the regularization of the mean due to the prior. Our result also suggests that posterior collapse may be a general problem of learning for deeper architectures and deepens our understanding of Bayesian deep learning.
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