A string of hard-core point particles undergoing elastic collisions in 1D can form an integrable system even when they are of unequal masses. This talk will introduce a simple example of such an integrable system that consists of three particles with two unequal mass species. A2: Ori Hirschberg, Technion Coauthors: David Mukamel, Gunter M. Schutz Emergent Motion Of Condensates In Mass Transport...