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Songshuo Lu

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#artificial intelligence Preprint Oct 2026

CARM: Cancellation-Aware Response Masking for LLM Reinforcement Learning

Recent years have witnessed the rapid adoption of reinforcement learning (RL) in large language model (LLM) post-training, with substantial gains in mathematical reasoning and code generation. In practical systems, however, policy updates and differences between rollout and training engines can make sampled responses o...

Ya-Fei Zhang, Song-Shuo Lu, Si-Cong Liao et al. · 0 citations
Jul 2026

Beyond the Best Teacher: Expanding and Compressing the Reasoning Solution Manifold

Strong students can be obtained not by selecting a single better teacher, but by deliberately constructing and compressing a complementary teacher union, in an expand-then-compress framework that couples teacher construction with multi-teacher policy distillation.

Songshuo Lu, Zhi Chen, Yao-Hua Tang · 1 citation

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