Posterior collapse in ฮฒ-VAEs is derived as automatic spectral pruning via Landau stability analysis, with collapse thresholds matching normalized PCA spectra in the linear Gaussian case and tested on WorldClim data.
1 displays the raw posterior mean-square ๐๐(๐ฅ)2, the scale-invariant signal fraction ๐ 2 ๐ (๐ ), and the posterior log-variance log ๐๐(๐ฅ)2 on a com- mon scan axis
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Posterior Collapse as Automatic Spectral Pruning
Posterior collapse in ฮฒ-VAEs is derived as automatic spectral pruning via Landau stability analysis, with collapse thresholds matching normalized PCA spectra in the linear Gaussian case and tested on WorldClim data.