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fine-tuning robustness 1large language models 1margin calibration 1model unlearning 1relearn attacks 1

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cs.AI2026

Crossing the Margin Cliff: Toward Relearn-Robust LLM Unlearning via Margin Calibration

Xiangyu Yin, Jiaxu Liu, Zhen Chen +1

The paper identifies a systematic “margin cliff” that makes large language model unlearning vulnerable to relearn attacks and proposes Margin Calibration, a plug‑in method that add…