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Hejian Sang
Researcher
PaperBeyond GRPO and On-Policy Distillation: An Empirical Sparse-to-Dense Reward Principle for Language-Model Post-TrainingAuthorship / preprint / 2026Yuanda XuCo-authorship / ResearcherZhengze ZhouCo-authorship / ResearcherRan HeCo-authorship / ResearcherZhipeng WangCo-authorship / ResearcherAlborz GeramifardCo-authorship / ResearcherTopicMachine LearningWorks on / 49008 worksTopicArtificial IntelligenceWorks on / 22915 works