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Fel et al.

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04:00
2026-08-31
arxiv.org
machine-learning

A Deeper Analysis of Block-Sparse Featurizers

A new analysis of the block-sparse featurizer (BSF), introduced by Fel et al. in 2026, finds it still suffers from classic sparse autoencoder failure modes like feature splitting and composition, desp…

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block-sparse featurizer 1 sparse autoencoder 1 Tournament Top-K 1 crosscoder 1
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machine learning 1 artificial intelligence 1 ai research 1