Explore optimal transport for graphs in this 55-minute conference talk by Nicolas Courty, recorded during the "Machine Learning and Signal Processing on Graphs" thematic meeting at the Centre International de Rencontres Mathématiques in Marseille, France. Delve into definitions and applications to graph-signal processing, gaining insights from a leading mathematician in the field. Access this video and other talks by worldwide mathematicians through CIRM's Audiovisual Mathematics Library, featuring chapter markers, keywords, enriched content with abstracts and bibliographies, and a multi-criteria search function for easy navigation.