Light-R1: Curriculum SFT, DPO and RL for Long COT from Scratch and Beyond. - Liang Wen; Yunke Cai; Fenrui Xiao; Xin He; Qi An; Zhenyu Duan; Yimin Du; Junchen Liu; Lifu Tang; Xiaowei Lv; Haosheng Zou; Yongchao Deng; et al. (CoRR, 2025)