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Author

Fang-yuan Kong

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#artificial intelligence Preprint Oct 2026

From Policy Evaluation to Off-Policy Control: Provable Emergence of In-Context Q-Learning

Transformers can implement reinforcement-learning algorithms in context, yet how off-policy control emerges within Transformers remains poorly understood. We study Q-learning, a foundational model-free control algorithm that combines off-policy bootstrapping with greedy policy improvement. We prove that a two-layer att...

Ying-Jun Mo, Ya-Jie Zhao, Fang-yuan Kong · 0 citations
Jul 2026

A Unified Algorithmic Framework for Hybrid Reinforcement Learning in Tabular MDPs with Shifted Transition Dynamics

A unified algorithmic framework featuring two algorithms: MIN-UCB-VI for regret minimization and MAX-LCB-VI for best policy identification for best policy identification is proposed, including both instance-dependent and independent upper bounds on regret and sub-optimality gap.

Zhe-Shun Wu, Renjie Zheng, Jinhang Zuo et al. · 1 citation
Book Open access Aug 2026

CES: Combinatorial Experts Selection via Contextual Linear Bandits

This work proposes an offline-to-online combinatorial experts selection (CES) framework that leverages offline evaluation to warm-start model capability estimation and employs online learning to adapt to capability shifts and correct offline inaccuracies.

Jinkun Xu, Minghan Wang, Zhiyong Wang et al. · 0 citations

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