activity
20072026
most citedA Unique "Nonnegative" Solution to an Underdetermined System: from Vectors to Matrices

88 citations · 605 across the 80 of their papers we have counts for

collaborators

84 papers

cs.MA2026

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

Ziqing Lu, Avinash Reddy Mudireddy, Sarra Alqahtani +1

AI agents are expected to play an increasingly important role in future decision-making systems. In this paper, we consider collaborative systems composed of heterogeneous multi-ag…

cs.LG2026

Efficient Preference Poisoning Attack on Offline RLHF

Chenye Yang, Weiyu Xu, Lifeng Lai

Offline Reinforcement Learning from Human Feedback (RLHF) pipelines such as Direct Preference Optimization (DPO) train on a pre-collected preference dataset, which makes them vulne…

econ.TH2026

Artificial Superintelligence May be Useless: Equilibria in the Economy of Multiple AI Agents

Huan Cai, Ziqing Lu, Catherine Xu +2

With recent development of artificial intelligence, it is more common to adopt AI agents in economic activities. This paper explores the economic actions of agents, including human…

cs.NE2026

Repair Brain Damage: Real-Numbered Error Correction Code for Neural Network

Ziqing Li, Myung Cho, Qiutong Jin +1

We consider a neural network (NN) that may experience memory faults and computational errors. In this paper, we propose a novel real-number-based error correction code (ECC) capabl…

cs.LG2025

Learn to Change the World: Multi-level Reinforcement Learning with Model-Changing Actions

Ziqing Lu, Babak Hassibi, Lifeng Lai +1

Reinforcement learning usually assumes a given or sometimes even fixed environment in which an agent seeks an optimal policy to maximize its long-term discounted reward. In contras…

cs.LG2025

Provably Invincible Adversarial Attacks on Reinforcement Learning Systems: A Rate-Distortion Information-Theoretic Approach

Ziqing Lu, Lifeng Lai, Weiyu Xu

Reinforcement learning (RL) for the Markov Decision Process (MDP) has emerged in many security-related applications, such as autonomous driving, financial decisions, and drone/robo…