Towards Safe and Optimal Online Bidding: A Modular Look-ahead Lyapunov Framework - Guo, Hengquan; Zhang, Haobo; Pan, Junwei; Huang, Shudong; Xie, Nianhua; Xiao, Lei; Gu, Haijie; Jiang, Jie; Liu, Xin (International Conference on Learning Representations, 2026)