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Li-Jie Chen

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#natural language process... Preprint Sep 2026

Generalization Dynamics of LM Pre-training

This suite provides a new efficient lens on generalization: select intermediate pre-training checkpoints that strongly generalize reasoning and alignment, better than the final pre- or mid-training checkpoints, and select pre-training data that controls and stabilizes generalization dynamics.

Jia-Xin Wen, Zhengxuan Wu, D. Song et al. · 0 citations

Understanding In-context Learning of Addition via Activation Subspaces

A novel method is introduced that localizes the model's few-shot learning ability to only a few attention heads through dimensionality reduction and decomposition of the heads'output spaces, and derives a mathematical identity relating the''aggregator''and''extractor''subspaces of attention heads, allowing us to track...

Xin-Yang Hu, Kayo Yin, Michael I Jordan et al. · 12 citations · ⚡2

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