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cs.CL2026
UserLM-R1: Modeling Human Reasoning in User Language Models with Multi-Reward Reinforcement Learning
Feng Zhang, Shijia Li, Chunmao Zhang +7
User simulators serve as the critical interactive environment for agent post-training, and an ideal user simulator generalizes across domains and proactively engages in negotiation…
cs.CL2025
Disentangling Feature Structure: A Mathematically Provable Two-Stage Training Dynamics in Transformers
Zixuan Gong, Shijia Li, Yong Liu +1
Transformers may exhibit two-stage training dynamics during the real-world training process. For instance, when training GPT-2 on the Counterfact dataset, the answers progress from…