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News/Concepts Whisper: Spectral Anti-Concentration and the Dual Geometry of Transformer Representations
arxiv
PublishedSeptember 1, 2026 at 4:00 AM

Concepts Whisper: Spectral Anti-Concentration and the Dual Geometry of Transformer Representations

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arXiv:2605.01609v2 Announce Type: replace-cross Abstract: We find that transformer concept representations systematically anti-concentrate in the spectral tail of the unembedding covariance, encoding word-level concepts in low-variance directions across a 17-model core suite and an expanded set of 2

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