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News/Representation Collapse in Sequential Post-Training of Large Language Models
arxiv
PublishedJune 1, 2026 at 4:00 AM
—neutral

Representation Collapse in Sequential Post-Training of Large Language Models

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arXiv:2605.30524v1 Announce Type: new Abstract: Large language models are now adapted through chains of post-training stages rather than through a single instruction-tuning pass. This paper studies whether such sequential post-training gradually compresses internal representations into low-rank, ani

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