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Author

Zhen-Bo Yu

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Preprint Aug 2026

GCPO: Diagnosing and Constraining Subspace Geometry in Rollout RL for LLMs

On-policy rollout methods such as GRPO are central to post-training of large language models, yet they frequently suffer from training instabilities, cross-task capability degradation, and response-length inflation. Although prior work has characterized the subspace geometry of aggregate updates, the stepwise variation...

Kai Yang, Jingwei Xu, Wan-Yu Wang et al. · 0 citations
Sep 2026

Latent Textual Space: Pivot for Scaling Customized Text-to-Image and Video Generation.

This paper introduces a novel Latent Textual Space (LTS), which is positioned after the text encoder and a linear projection layer, and develops LATEXBLEND-I/G/V inference pipelines for three prominent customized generation tasks, enabling seamless plug-and-play combination of multiple concepts.

Jian Jin, Zhen-Bo Yu, Yang Shen et al. · 0 citations

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