AlphaSteer: Learning Refusal Steering with Principled Null-Space Constraint - Sheng, Leheng; Shen, Changshuo; Zhao, Weixiang; Fang, Junfeng; Liu, Xiaohao; Liang, Zhenkai; Wang, Xiang; Zhang, An; Chua, Tat-Seng (International Conference on Learning Representations, 2026)