Query Expansion as a Matrix Factorization Problem: Extended Abstract

Pseudo-relevance feedback (PRF) provides an automatic method for query expansion in Information Retrieval. These techniques find relevant expansion terms using the top retrieved documents with the original query. In this paper, we present an approach based on linear methods called LiMe that formulates the PRF task as a matrix factorization problem. LiMe learns an inter-term similarity matrix from the pseudo-relevant set and the query that uses for computing expansion terms. The experiments on five datasets show that LiMe outperforms state-of-the-art baselines in most cases.