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April 24, 2026cs.IR
Objective Shaping with Hard Negatives: Windowed Partial AUC Optimization for RL-based LLM Recommenders
Wentao Shi, Qifan Wang, Chen Chen, Fei Liu, Dongfang Liu, Xu Liu, Wanli Ma, Junfeng Pan, Linhong Zhu, Fuli Feng
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