Reproduce “Coordination Graphs for Constrained Multi-Agent Reinforcement Learning” on OpenResearch

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About this paper

Santiago Amaya-Corredor, Miguel Calvo-Fullana, Anders Jonsson

Researchers at Universitat Pompeu Fabra introduced CG-CMARL, a framework that integrates coordination graphs with Lagrangian duality to address scalability and safety constraints in multi-agent reinforcement learning. This approach successfully generates superior performance-safety Pareto fronts compared to baselines on cooperative navigation tasks with up to 10 agents, allowing for dynamic trade-off adjustments from a single trained model.

Key insights

  • Decoupling the primary and cost Q-functions allows a single trained policy to dynamically adjust the objective-constraint trade-off at evaluation time without retraining.
  • Max-Sum coordination enables scalability by efficiently solving the joint action selection problem in a decentralized manner.
  • Lagrangian duality provides a principled, theoretically grounded approach to enforce safety constraints in multi-agent systems, converging to optimal dual solutions under specific conditions.

Summary by alphaXiv.

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