Reconsidering Overthinking: Penalizing Internal and External Redundancy in CoT Reasoning. - Jialiang Hong; Taihang Zhen; Kai Chen 026; Jiaheng Liu; Wenpeng Zhu; Jing Huo; Yang Gao 001; Depeng Wang; Haitao Wan; Xi Yang; Boyan Wang; Fanyu Meng (CoRR, 2025)