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Yuanxin Liu

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#artificial intelligence Preprint Oct 2026

Variance-Optimal State Resampling for Reinforcement Learning with Verifiable Rewards

Reinforcement learning with verifiable rewards spends much of its rollout budget on states that yield no learning signal. We recast this as a question about the sampling distribution itself: under a fixed rollout budget, which distribution over states minimizes the variance of the policy-gradient estimator? The answer...

Yi-Bo Wang, Yuan-Xin Liu, Zhao-Ran Wang · 0 citations
#artificial intelligence Preprint Sep 2026

CodeMidas: Scaling Agentic Coding RL Environments from Code Itself

Training capable coding agents via reinforcement learning (RL) requires diverse tasks with reliable verifiers. Open-source codebases offer a rich source of such tasks, while existing methods typically rely on development artifacts such as issues and commits, limiting the range of tasks that can be extracted. To better...

Bo-Wen Ye, Lei Li, Shi-Cheng Li et al. · 0 citations
#reinforcement learning Preprint Aug 2026

Not Just Reason, Not Just Scan: Reinforcement Learning for Proactive Scientific Error Verification over Academic Paper

This work presents VERA-RL, a reinforcement-learning formulation for scientific error detection over academic papers, and constructs VERA-13K, a 12,900-sample dataset organized into 4,300 matched chains, covering 6 scientific-error categories across the research workflow and broad natural-science domains.

Rongjin Li, Yuanxin Liu, Hao Zhou et al. · 0 citations
Preprint Aug 2026

What Proves You Wrong: Benchmarking Language Models on Falsifiable Research Ideation

The Lit2Test benchmark centers on a six-field contract organized around a falsifying outcome, so that every proposal precommits the observation that would prove it wrong, making its quality decidable in the first place rather than merely arguable.

Zi-Yue Wang, Aomufei Yuan, Yi-Ran Yao et al. · 2 citations

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