WSM: Decay-Free Learning Rate Schedule via Checkpoint Merging for LLM Pre-training - Tian, Changxin; Wang, Jiapeng; Zhao, Qian; Chen, Kunlong; Liu, Jia; Liu, Ziqi; Mao, Jiaxin; Zhao, Xin; Zhang, Zhiqiang; ZHOU, JUN (International Conference on Learning Representations, 2026)