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News/Rank Measures of Fine-Tuning Updates Need a Noise Baseline
arxiv
PublishedOctober 19, 2026 at 4:00 AM

Rank Measures of Fine-Tuning Updates Need a Noise Baseline

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arXiv:2610.22438v1 Announce Type: new Abstract: Studies of what fine-tuning does to a language model often summarise the weight update $\Delta W$ by its rank. We compare the rank measures used for this against the same measures on a random matrix of the same shape, and against two harder references:

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