Author

Jiaxin Ding

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Preprint Aug 2026

Beyond the Mean: Multi-Moment Policy Optimization for LLM Reasoning

A moment-based perspective on policy optimization for LLM reasoning is introduced by treating the failure probability of a randomly sampled problem as a random variable and characterizing optimization objectives through its moments, leading to MMPO, a novel policy optimization framework that jointly minimizes multiple...

Yijun Zhang, Yule Xie, Jia-Xin Ding et al. · 0 citations

Jul 2026

Information Gain-based Rollout Policy Optimization: An Adaptive Tree-Structured Rollout Approach for Multi-Turn LLM Agents

Information Gain-based Rollout Policy Optimization (IGRPO) is proposed, a policy optimization framework that treats intermediate-state informativeness as the organizing principle of rollout collection and performs budget-aware tree-structured rollouts by allocating expansion budget according to node-level informativene...

Yijun Zhang, Fan Xu, Jiaxin Ding et al. · arXiv.org · 2 citations