Recommender systems

Linyuan LÜ, Matúš MEDO, Chi Ho YEUNG, Yi-Cheng ZHANG, Zi-Ke ZHANG, Tao ZHOU

Research output: Contribution to journalArticlespeer-review

910 Citations (Scopus)


The ongoing rapid expansion of the Internet greatly increases the necessity of effective recommender systems for filtering the abundant information. Extensive research for recommender systems is conducted by a broad range of communities including social and computer scientists, physicists, and interdisciplinary researchers. Despite substantial theoretical and practical achievements, unification and comparison of different approaches are lacking, which impedes further advances. In this article, we review recent developments in recommender systems and discuss the major challenges. We compare and evaluate available algorithms and examine their roles in the future developments. In addition to algorithms, physical aspects are described to illustrate macroscopic behavior of recommender systems. Potential impacts and future directions are discussed. We emphasize that recommendation has great scientific depth and combines diverse research fields which makes it interesting for physicists as well as interdisciplinary researchers. Copyright © 2012 Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)1-49
JournalPhysics Reports
Issue number1
Publication statusPublished - Oct 2012


Lü, L., Medo, M., Yeung, C. H., Zhang, Y.-C., Zhang, Z.-K., & Zhou, T. (2012). Recommender systems. Physics Reports, 519(1), 1-49. doi: 10.1016/j.physrep.2012.02.006


  • Recommender systems
  • Information filtering
  • Networks


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