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.
How Contextual are Contextualized Word Representations? Com- paring the Geometry of BERT, ELMo, and GPT-2 Embeddings
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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.