See also the following links:

▎ENGLISH

Recommender System
▸ https://en.wikipedia.org/wiki/Recommender_system

Recommendation System -Understanding The Basic Concepts
▸ https://www.analyticsvidhya.com/blog/2021/07/recommendation-system-understanding-the-basic-concepts/

▎日 本 語

機械学習に基づく推薦システム
▸ https://ibisml.org/archive/ibis2014/IBIS2014tutorial_iwata_color.pdf

これから推薦システムを作る方向けの推薦システム入門
▸ https://note.com/masa_kazama/n/n586d0e2d49d2

推薦システムの手法のまとめ
▸ https://yolo-kiyoshi.com/2020/06/22/post-1947/