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Yicheng Lang

3 accepted papers

2026

Downgrade to Upgrade: Optimizer Simplification Enhances Robustness in LLM Unlearning

ICLR 2026poster

Large language model (LLM) unlearning aims to surgically remove the influence of undesired data or knowledge from an existing model while preserving its utility on unrelated tasks. This paradigm has shown promise in addressing privacy and safety concerns. However, recent findings reveal that unlearn…

Cited by 0SourcecodeScholar
2026

Position: Zeroth-Order Optimization in Deep Learning Is Underexplored, Not Underpowered

ICML 2026spotlight

Zeroth-order (ZO) optimization, learning from finite differences of function evaluations without backpropagation, has recently regained attention in deep learning due to its memory efficiency and applicability to gray- or black-box pipelines. Yet, ZO methods are often dismissed as fundamentally unsc…

Cited by 0SourceScholar
2025

Beyond Single-Value Metrics: Evaluating and Enhancing LLM Unlearning with Cognitive Diagnosis

ACL 2025finding

Due to the widespread use of LLMs and the rising critical ethical and safety concerns, LLM unlearning methods have been developed to remove harmful knowledge and undesirable capabilities. In this context, evaluations are mostly based on single-value metrics such as QA accuracy. However, these metric…