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Distributionally Robust Online Markov Game with Linear Function Approximation

arXiv — stat.ML•Wednesday, November 12, 2025 at 5:00:00 AM
PositiveArtificial Intelligence
The recent publication titled 'Distributionally Robust Online Markov Game with Linear Function Approximation' addresses a critical challenge in reinforcement learning known as the sim-to-real gap, where agents trained in simulations struggle in real-world applications. To tackle this, the authors propose a novel algorithm, DR-CCE-LSI, designed for sample efficiency in online Markov games. This algorithm not only aims to find an epsilon-approximate robust Coarse Correlated Equilibrium (CCE) but also incorporates a regret bound of O{dHmin{H,1/min{\sigma_i}}\sqrt{K}}, indicating its potential effectiveness in large state spaces. The significance of this work lies in its ability to enhance the robustness of AI systems, ensuring they perform reliably even when faced with unexpected environmental changes. By achieving minimax optimal sample complexity, the DR-CCE-LSI algorithm represents a substantial advancement in the field, promising improved outcomes for AI applications across various do…
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