Rethinking Generalization in Reasoning SFT: A Conditional Analysis on Optimization, Data, and Model Capability. - Qihan Ren; Peng Wang; Ruikun Cai; Shuai Shao; Dadi Guo; Yuejin Xie; Yafu Li; Quanshi Zhang; Xia Hu 001; Jing Shao; Dongrui Liu (CoRR, 2026)