Author

Weiyu Xu

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Preprint Oct 2026

Robust Direct Preference Optimization under Preference Label-Flip Attacks

Direct Preference Optimization (DPO) is widely used for offline Reinforcement Learning from Human Feedback. However, recent works have shown that DPO can be easily manipulated by adversarial preference label flip attacks, which are specifically designed to mislead the learner toward an attacker-chosen target policy. To...

Chen-Ye Yang, Wei-Yu Xu, Li-Feng Lai · 0 citations

Preprint Aug 2026

History Matters: Meta-policy Delegation with Heterogeneous Multi-agent Reinforcement Learning

This paper develops a multi-agent reinforcement learning-based (MARL) delegation training that enables agents to make sequential delegation decisions while minimizing the total execution cost and introduces two new frameworks for collaboration and delegation in multi-agent systems.

Ziqing Lu, Avinash Mudireddy, Sarra M. Alqahtani et al. · 0 citations