Distributional Preference Alignment of LLMs via Optimal Transport - Melnyk, Igor; Mroueh, Youssef; Belgodere, Brian; Rigotti, Mattia; Nitsure, Apoorva; Yurochkin, Mikhail; Greenewald, Kristjan; Navratil, Jiri; Ross, Jarret (Advances in Neural Information Processing Systems, 2024)