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#machine learning Preprint Sep 2026

When Sparse Reward Meets Dense Distillation: Training Dynamics of On-Policy Distillation

Reinforcement learning with verifiable rewards provides a sparse post-training signal: a single binary outcome evaluates the entire rollout, and every token receives the same sequence-level advantage regardless of its individual contribution. To complement this sparse supervision, a growing family of methods adds a sca...

Xin-Ke Jiang, Tao Feng, Zhi-Bang Yang et al. · 0 citations
#machine learning Preprint Sep 2026

GenMem: Generative Symbolic Memory for Self-Evolving Harness

Long-term memory supports the self-evolution of LLM agents by retaining experience and skills across tasks and enabling their retrieval, reuse, and revision in subsequent long-horizon decision-making. Yet existing memory management approaches remain limited to discriminative retrieval and to address the sparse, hierarc...

Xin-Ke Jiang, Tao Feng, Wei-Xuan Xu et al. · 0 citations
Preprint Aug 2026

SERL-SQL: Selective Hindsight Distillation for Text-to-SQL Reinforcement Agentic Learning

Recent Text-to-SQL systems increasingly rely on multi-turn interaction, execution feedback, and reinforcement learning. However, most existing methods use execution correctness only as a trajectory-level reward, which provides limited guidance for identifying the SQL decisions responsible for success or failure. We pro...

Tao Liu, Tao Feng, Xiangheng Li et al. · 0 citations
#artificial intelligence Preprint Aug 2026

AgenticRag-R1: Agentic Reinforcement Learning with Stack Memory for Multi-Step Reasoning, Retrieval and Memorizing

This work proposes AgenticRag-R1, a RL framework that deeply integrates reasoning, retrieval, and memory via a memory stack and fine-grained action space, supported by hierarchical action-aware rewards and an information-aware trajectory rejection strategy to enable effective long-horizon learning.

Xin-Ke Jiang, Yue Fang, Zhi-Bang Yang et al. · 2 citations

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