A persistent-entropy regularization loss reduces anisotropy of BERT and RoBERTa embeddings during fine-tuning, but downstream accuracy gains are small and mixed across tasks.
Persistent entropy for separating topo- logical features from noise in Vietoris-rips complexes
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Shrink the longest: improving latent space isotropy with symplicial geometry
A persistent-entropy regularization loss reduces anisotropy of BERT and RoBERTa embeddings during fine-tuning, but downstream accuracy gains are small and mixed across tasks.