PeRL: Permutation-Enhanced Reinforcement Learning for Interleaved Vision-Language Reasoning - Zhang, Yizhen; Ding, Yang; Zhang, Shuoshuo; Zhang, Xinchen; Li, Haoling; Li, Zhong-Zhi; Wang, Peijie; Wu, Jie; Ji, Lei; Gong, Yeyun; shen, yelong; Yang, Yujiu (Advances in Neural Information Processing Systems, 2025)