Aggregation of preferences in recommender systems

http://www.springerlink.com/content/p81572u04423v113/

Authors:  G. Beliakov, T. Calvo and S. James

Book Title:  Recommender Systems Handbook

Date Accepted: 24 December 2009

Abstract

This chapter gives an overview of aggregation functions toward their use in recommender systems. Simple aggregation functions such as the arithmetic mean are often employed to aggregate user features, item ratings, measures of similarity, etc., however many other aggregation functions exist which could deliver increased accuracy and flexibility to many systems. We provide definitions of some important families and properties, sophisticated methods of construction, and various examples of aggregation functions in the domain of recommender systems.

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