The Choice of Divergence: A Neglected Key to Mitigating Diversity Collapse in Reinforcement Learning with Verifiable Reward - Li, Long; Zhou, Zhijian; HAO, JIARAN; Liu, Jason; Miao, Yanting; Pang, Wei; Tan, Xiaoyu; Chu, Wei; Wang, Zhe; Pan, Shirui; Qu, Chao; Qi, Yuan (International Conference on Learning Representations, 2026)