Perception-Aware Policy Optimization for Multimodal Reasoning - Wang, Zhenhailong; Guo, Xuehang; Stoica, Sofia; Xu, Haiyang; WANG, Hongru; Ha, Hyeonjeong; Chen, Xiusi; Chen, Yangyi; Yan, Ming; Huang, Fei; Ji, Heng (International Conference on Learning Representations, 2026)