This chapter is only a brief foray into Active Learning in Recommender Systems.3 We hope that this chapter can, however, provide the necessary foundations.
For further reading, [46] gives a good, general overview of AL in the context
of Machine Learning (with a focus on Natural Language Processing and Bioinformatics). For a theoretical perspective related to AL (a major focus in the field of
Experimental Design), see [7, 4, 22]; there have also been recent works in Computer Science [16, 5, 51].