SR-LLM: An incremental symbolic regression framework driven by LLM-based retrieval-augmented generation - Zelin Guo; Siqi Wang; Yonglin Tian; Jing Yang; Hui Yu; Xiaoxiang Na; Levente Kovács; Li Li; Petros A. Ioannou; Fei-Yue Wang (Proceedings of the National Academy of Sciences, 2025)