Unlocking Multimodal Mathematical Reasoning via Process Reward Model - Luo, Ruilin; Zheng, Zhuofan; Wang, Lei; Wang, Yifan; Ni, Xinzhe; Lin, Zicheng; Jiang, Songtao; Yu, Yiyao; Shi, Chufan; Chu, Ruihang; zeng, Jin; Yang, Yujiu (Advances in Neural Information Processing Systems, 2025)