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Large Language Model (LLM)-based Multi-agent Systems (MAS) have demonstrated remarkable capabilities in various complex tasks, ranging from collaborative problem-solving to autonomous decision-making. However, as these systems become…

Cryptography and Security · Computer Science 2025-02-18 Shilong Wang , Guibin Zhang , Miao Yu , Guancheng Wan , Fanci Meng , Chongye Guo , Kun Wang , Yang Wang

Multi-agent LLM systems enable advanced reasoning and tool use via role specialization, yet reliable reinforcement learning (RL) post-training for such systems remains difficult. In this work, we theoretically pinpoint a key reason for…

Machine Learning · Computer Science 2026-02-10 Lang Feng , Longtao Zheng , Shuo He , Fuxiang Zhang , Bo An

Multi-agent systems (MAS) and reinforcement learning (RL) are widely used to enhance the agentic capabilities of large language models (LLMs). MAS improves task performance through role-based orchestration, while RL uses environmental…

Machine Learning · Computer Science 2026-02-02 Yujie Zhao , Lanxiang Hu , Yang Wang , Minmin Hou , Hao Zhang , Ke Ding , Jishen Zhao

Large language model multi-agent systems (LLM-MAS) offer a promising paradigm for harnessing collective intelligence to achieve more advanced forms of AI behaviour. While recent studies suggest that LLM-MAS can outperform LLM single-agent…

Artificial Intelligence · Computer Science 2025-10-07 Bohan Tang , Huidong Liang , Keyue Jiang , Xiaowen Dong

Aligned large language models (LLMs) are vulnerable to jailbreaking attacks, which bypass the safeguards of targeted LLMs and fool them into generating objectionable content. While initial defenses show promise against token-based threat…

Computation and Language · Computer Science 2024-03-01 Jiabao Ji , Bairu Hou , Alexander Robey , George J. Pappas , Hamed Hassani , Yang Zhang , Eric Wong , Shiyu Chang

This paper proposes a guaranteed defense method for large language models (LLMs) to safeguard against jailbreaking attacks. Drawing inspiration from the denoised-smoothing approach in the adversarial defense domain, we propose a novel…

Cryptography and Security · Computer Science 2026-05-12 Zheng Lin , Zhenxing Niu , Haoxuan Ji , Haichang Gao

LLM-powered Multi-Agent Systems (LLM-MAS) unlock new potentials in distributed reasoning, collaboration, and task generalization but also introduce additional risks due to unguaranteed agreement, cascading uncertainty, and adversarial…

Multiagent Systems · Computer Science 2025-10-22 Jinwei Hu , Yi Dong , Shuang Ao , Zhuoyun Li , Boxuan Wang , Lokesh Singh , Guangliang Cheng , Sarvapali D. Ramchurn , Xiaowei Huang

Multi-agent systems (MAS) extend large language models (LLMs) from independent single-model reasoning to coordinative system-level intelligence. While existing LLM agents depend on text-based mediation for reasoning and communication, we…

Computation and Language · Computer Science 2025-12-09 Jiaru Zou , Xiyuan Yang , Ruizhong Qiu , Gaotang Li , Katherine Tieu , Pan Lu , Ke Shen , Hanghang Tong , Yejin Choi , Jingrui He , James Zou , Mengdi Wang , Ling Yang

Neural ranking models have achieved remarkable progress and are now widely deployed in real-world applications such as Retrieval-Augmented Generation (RAG). However, like other neural architectures, they remain vulnerable to adversarial…

Cryptography and Security · Computer Science 2025-12-30 Jiawei Liu , Zhuo Chen , Rui Zhu , Miaokun Chen , Yuyang Gong , Wei Lu , Xiaofeng Wang

Large language model-based multi-agent systems have shown great abilities across various tasks due to the collaboration of expert agents, each focusing on a specific domain. However, the impact of clumsy or even malicious agents--those who…

Artificial Intelligence · Computer Science 2025-05-30 Jen-tse Huang , Jiaxu Zhou , Tailin Jin , Xuhui Zhou , Zixi Chen , Wenxuan Wang , Youliang Yuan , Michael R. Lyu , Maarten Sap

This paper proposes a new approach to analyze and synthesize robust consensus control laws for general linear leaderless multi-agent systems (MASs) subjected to input constraints or uncertainties. First, the MAS under input constraints or…

Optimization and Control · Mathematics 2016-05-17 Dinh Hoa Nguyen , Tatsuo Narikiyo , Michihiro Kawanishi

The remarkable growth in large language model (LLM) capabilities has spurred exploration into multi-agent systems, with debate frameworks emerging as a promising avenue for enhanced problem-solving. These multi-agent debate (MAD)…

Artificial Intelligence · Computer Science 2025-06-23 Yongjin Yang , Euiin Yi , Jongwoo Ko , Kimin Lee , Zhijing Jin , Se-Young Yun

LLM-based multi-agent systems (MAS) have emerged as a promising approach to tackle complex tasks that are difficult for individual LLMs. A natural strategy is to scale performance by increasing the number of agents; however, we find that…

Artificial Intelligence · Computer Science 2026-02-04 Yingxuan Yang , Chengrui Qu , Muning Wen , Laixi Shi , Ying Wen , Weinan Zhang , Adam Wierman , Shangding Gu

Randomized smoothing (RS) is one of the prominent techniques to ensure the correctness of machine learning models, where point-wise robustness certificates can be derived analytically. While RS is well understood for classification, its…

Machine Learning · Computer Science 2025-09-22 Emmanouil Seferis , Changshun Wu , Stefanos Kollias , Saddek Bensalem , Chih-Hong Cheng

While Large Language Model (LLM) multi-agent systems (MAS) offer a transformative approach to simulating human behavior in complex systems, it remains largely unexplored whether these simulations can replicate realistic structural and…

Social and Information Networks · Computer Science 2026-05-14 Siqi Miao , Ziyang Chen , Yuhong Luo , Hans Hao-Hsun Hsu , Mufei Li , Kaiqing Zhang , Pan Li

Recently it has been shown that state-of-the-art NLP models are vulnerable to adversarial attacks, where the predictions of a model can be drastically altered by slight modifications to the input (such as synonym substitutions). While…

Computation and Language · Computer Science 2023-07-13 Yahan Yang , Soham Dan , Dan Roth , Insup Lee

Reinforcement learning is a promising approach to learning control policies for performing complex multi-agent robotics tasks. However, a policy learned in simulation often fails to guarantee even simple safety properties such as obstacle…

Systems and Control · Electrical Eng. & Systems 2020-01-01 Wenbo Zhang , Osbert Bastani , Vijay Kumar

Therapy recommendation for chronic patients with multimorbidity is challenging due to risks of treatment conflicts. Existing decision support systems face scalability limitations. Inspired by the way in which general practitioners (GP)…

Artificial Intelligence · Computer Science 2025-07-16 Yicong Wu , Ting Chen , Irit Hochberg , Zhoujian Sun , Ruth Edry , Zhengxing Huang , Mor Peleg

Large language models (LLMs) have proven effective in artificial intelligence, where the multi-agent system (MAS) holds considerable promise for healthcare development by achieving the collaboration of LLMs. However, the absence of a…

Artificial Intelligence · Computer Science 2026-05-13 Zhihao Peng , Liuxin Bao , Yixuan Yuan

Manufacturing industries are facing increasing product variability due to the growing demand for personalized products. Under these conditions, ensuring safety becomes challenging as frequent reconfigurations can lead to unintended…

Multiagent Systems · Computer Science 2026-04-21 Jonghan Lim , Mostafa Tavakkoli Anbarani , Rômulo Meira-Góes , Ilya Kovalenko