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20242026
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cs.LG2026

Demystifying the Optimal Fair Classifier in Multi-Class Classification

Li Zhang, Yuyuan Li, XiaoHua Feng +3

Ensuring fair and equitable treatment across diverse groups, particularly in multi-class classification tasks, poses a significant challenge due to the persistent biases inherent i…

cs.LG2025

FedFACT: A Provable Framework for Controllable Group-Fairness Calibration in Federated Learning

Li Zhang, Zhongxuan Han, Xiaohua Feng +3

With the emerging application of Federated Learning (FL) in decision-making scenarios, it is imperative to regulate model fairness to prevent disparities across sensitive groups (e…

cs.LG2025

Leveraging Machine Unlearning for Cost-Efficient Preference Alignment

Xiaohua Feng, Yuyuan Li, Huwei Ji +4

Despite advances in Preference Alignment (PA) for Large Language Models (LLMs), mainstream methods like reinforcement learning with human feedback face notable challenges. These ap…

cs.LG2025

A Neuro-inspired Interpretation of Unlearning in Large Language Models through Sample-level Unlearning Difficulty

Xiaohua Feng, Yuyuan Li, Chengye Wang +3

Driven by privacy protection laws and regulations, unlearning in Large Language Models (LLMs) is gaining increasing attention. However, current research often neglects the interpre…

cs.LG2025

Controllable Unlearning for Image-to-Image Generative Models via -Constrained Optimization

Xiaohua Feng, Yuyuan Li, Chaochao Chen +4

While generative models have made significant advancements in recent years, they also raise concerns such as privacy breaches and biases. Machine unlearning has emerged as a viable…