Scalable Hyperbolic Recommender Systems

• Main Authors: Chamberlain, Benjamin Paul, Hardwick, Stephen R, Wardrope, David R, Dzogang, Fabon, Daolio, Fabio, Vargas, Saúl
• Format: Journal Article
• Language: English
• Published: 22.02.2019
• Subjects: Computer Science - Information Retrieval; Computer Science - Learning; Statistics - Machine Learning
• DOI: 10.48550/arxiv.1902.08648

We present a large scale hyperbolic recommender system. We discuss why hyperbolic geometry is a more suitable underlying geometry for many recommendation systems and cover the fundamental milestones and insights that we have gained from its development. In doing so, we demonstrate the viability of hyperbolic geometry for recommender systems, showing that they significantly outperform Euclidean models on datasets with the properties of complex networks. Key to the success of our approach are the novel choice of underlying hyperbolic model and the use of the Einstein midpoint to define an asymmetric recommender system in hyperbolic space. These choices allow us to scale to millions of users and hundreds of thousands of items.