Posterior Collapse of a Linear Latent Variable Model
Posterior Collapse of a Linear Latent Variable Model
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DOI:
10.48550/arxiv.2205.04009
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发表时间:
2022-05
期刊:
影响因子:
--
通讯作者:
Zihao Wang;Liu Ziyin
中科院分区:
文献类型:
--
作者:
Zihao Wang;Liu Ziyin
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 suggests that posterior collapse may be related to neural collapse and dimensional collapse and could be a subclass of a general problem of learning for deeper architectures.