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A. Ozdaglar

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#machine learning Preprint Oct 2026

Taylor Representations for Model-Free RL in Networked MDPs

In Networked Markov Decision Processes, transition dynamics are often unknown and the state--action space grows rapidly with the number of agents. In this setting, Taylor representations naturally approximate $Q$-functions, but a naive order-$n$ expansion over $N$ agents requires $\Theta(N^n)$ coefficients. We justify...

Salah Chikhi, Abdelhaq Chaoui, A. Ozdaglar et al. · 0 citations
#machine learning Preprint Aug 2026

Constant Individual Regret in General Games

This work introduces \emph{ECHO-OFTRL}: optimistic follow-the-regularized-leader (OFTRL) equipped with an EMA cascade for high-order optimism (ECHO), where EMA denotes exponential moving average, and leverages a new form of optimism inspired by modern filter design.

Mingyang Liu, Gabriele Farina, A. Ozdaglar · 5 citations · ⚡4
#artificial intelligence Preprint Aug 2026

Denoising as Projection: Constrained Optimization with Gradient-Guided Diffusion

The proposed update incorporates the objective gradient inside the denoising step, yielding an inference-time method that uses only a pretrained denoiser and gradient evaluations and is analyzed as an inexact projected-gradient method for constrained optimization over learned feasible geometries.

R. Zhang, Jiawei Zhang, Gioele Zardini et al. · 0 citations

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