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Reinforcement learning (RL) relies heavily on exploration to learn from its environment and maximize observed rewards. Therefore, it is essential to design a reward function that guarantees optimal learning from the received experience.…

Artificial Intelligence · Computer Science 2022-06-20 Ingy ElSayed-Aly , Lu Feng

Advancements in deep multi-agent reinforcement learning (MARL) have positioned it as a promising approach for decision-making in cooperative games. However, it still remains challenging for MARL agents to learn cooperative strategies for…

Multiagent Systems · Computer Science 2025-06-19 Yuan Zhuang , Yi Shen , Zhili Zhang , Yuxiao Chen , Fei Miao

Reinforcement Learning (RL) has emerged as a crucial method for training or fine-tuning large language models (LLMs), enabling adaptive, task-specific optimizations through interactive feedback. Multi-Agent Reinforcement Learning (MARL), in…

Machine Learning · Computer Science 2026-02-10 Junwei Su , Chuan Wu

In recent years, Large Language Models (LLMs) have shown great abilities in various tasks, including question answering, arithmetic problem solving, and poem writing, among others. Although research on LLM-as-an-agent has shown that LLM can…

Multiagent Systems · Computer Science 2024-05-21 Chuanneng Sun , Songjun Huang , Dario Pompili

Causal reasoning is increasingly used in Reinforcement Learning (RL) to improve the learning process in several dimensions: efficacy of learned policies, efficiency of convergence, generalisation capabilities, safety and interpretability of…

Machine Learning · Computer Science 2025-03-25 Giovanni Briglia , Stefano Mariani , Franco Zambonelli

Deception is prevalent in human social settings. However, studies into the effect of deception on reinforcement learning algorithms have been limited to simplistic settings, restricting their applicability to complex real-world problems.…

Multiagent Systems · Computer Science 2022-09-07 Matthew Aitchison , Lyndon Benke , Penny Sweetser

We consider the problem of robust multi-agent reinforcement learning (MARL) for cooperative communication and coordination tasks. MARL agents, mainly those trained in a centralized way, can be brittle because they can adopt policies that…

Multiagent Systems · Computer Science 2020-12-16 T. van der Heiden , C. Salge , E. Gavves , H. van Hoof

Generalization in reinforcement learning (RL) is of importance for real deployment of RL algorithms. Various schemes are proposed to address the generalization issues, including transfer learning, multi-task learning and meta learning, as…

Machine Learning · Computer Science 2022-10-07 Chang Yang , Ruiyu Wang , Xinrun Wang , Zhen Wang

Multi-agent reinforcement learning (MARL) has long been a significant and everlasting research topic in both machine learning and control. With the recent development of (single-agent) deep RL, there is a resurgence of interests in…

Machine Learning · Computer Science 2019-12-10 Kaiqing Zhang , Zhuoran Yang , Tamer Başar

We study the problem of online multi-agent reinforcement learning (MARL) in environments with sparse rewards, where reward feedback is not provided at each interaction but only revealed at the end of a trajectory. This setting, though…

Machine Learning · Computer Science 2025-09-29 The Viet Bui , Tien Mai , Hong Thanh Nguyen

Multiagent Reinforcement Learning (MARL) poses significant challenges due to the exponential growth of state and action spaces and the non-stationary nature of multiagent environments. This results in notable sample inefficiency and hinders…

Multiagent Systems · Computer Science 2025-02-27 Nikhilesh Prabhakar , Ranveer Singh , Harsha Kokel , Sriraam Natarajan , Prasad Tadepalli

Multi-agent reinforcement learning (MARL) has been gaining extensive attention from academia and industries in the past few decades. One of the fundamental problems in MARL is how to evaluate different approaches comprehensively. Most…

Multiagent Systems · Computer Science 2022-06-22 Zhiuxan Liang , Jiannong Cao , Shan Jiang , Divya Saxena , Jinlin Chen , Huafeng Xu

Training a multi-agent reinforcement learning (MARL) algorithm is more challenging than training a single-agent reinforcement learning algorithm, because the result of a multi-agent task strongly depends on the complex interactions among…

Machine Learning · Computer Science 2021-01-19 Heechang Ryu , Hayong Shin , Jinkyoo Park

In this paper, we study the problem of networked multi-agent reinforcement learning (MARL), where a number of agents are deployed as a partially connected network and each interacts only with nearby agents. Networked MARL requires all…

Machine Learning · Computer Science 2022-06-22 Yuxuan Yi , Ge Li , Yaowei Wang , Zongqing Lu

Multi-agent adversarial inverse reinforcement learning (MA-AIRL) is a recent approach that applies single-agent AIRL to multi-agent problems where we seek to recover both policies for our agents and reward functions that promote expert-like…

Multiagent Systems · Computer Science 2020-02-26 Wonseok Jeon , Paul Barde , Derek Nowrouzezahrai , Joelle Pineau

Large sequence model (SM) such as GPT series and BERT has displayed outstanding performance and generalization capabilities on vision, language, and recently reinforcement learning tasks. A natural follow-up question is how to abstract…

Multiagent Systems · Computer Science 2022-10-31 Muning Wen , Jakub Grudzien Kuba , Runji Lin , Weinan Zhang , Ying Wen , Jun Wang , Yaodong Yang

We discuss the role of coordination as a direct learning objective in multi-agent reinforcement learning (MARL) domains. To this end, we present a novel means of quantifying coordination in multi-agent systems, and discuss the implications…

Multiagent Systems · Computer Science 2022-08-15 Sean L. Barton , Nicholas R. Waytowich , Derrik E. Asher

Recent advances in multi-agent reinforcement learning (MARL) have demonstrated success in numerous challenging domains and environments, but typically require specialized models for each task. In this work, we propose a coherent methodology…

Many recent successful off-policy multi-agent reinforcement learning (MARL) algorithms for cooperative partially observable environments focus on finding factorized value functions, leading to convoluted network structures. Building on the…

Machine Learning · Computer Science 2023-10-27 Raphaël Avalos , Mathieu Reymond , Ann Nowé , Diederik M. Roijers

In the real world, people/entities usually find matches independently and autonomously, such as finding jobs, partners, roommates, etc. It is possible that this search for matches starts with no initial knowledge of the environment. We…

Machine Learning · Computer Science 2021-12-07 Kshitija Taywade , Judy Goldsmith , Brent Harrison