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Hyukjun Yang

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#artificial intelligence Preprint Sep 2026

Lifted Bellman Linear Programming for Offline Reinforcement Learning

Offline reinforcement learning (RL) typically trains a critic by minimizing a regression loss against bootstrapped value targets stabilized by target networks with exponential moving average (EMA) updates. Multi-step targets incorporate behavior-policy actions and therefore require off-policy correction. We instead imp...

Hyukjun Yang, Jongchan Park, Narim Jeong et al. · 0 citations
#artificial intelligence Preprint Sep 2026

Refinement-Based Flow Policy Optimization

Experiments on six synthetic two-dimensional target distributions with diverse geometries demonstrate that RFPO captures complex multimodal structure without mode collapse, and across six continuous-control tasks, RFPO matches or outperforms a standard Gaussian-policy baseline on almost every task.

B. Park, Hyukjun Yang, Donghwan Lee · 1 citation

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